High Security Locks San Francisco: Medeco & Mul-T-Lock
High security locks San Francisco homes and businesses trust: Medeco, Mul-T-Lock, Abloy & Primus experts, automotive and property security, 7 AM–11:30 PM, 7 days a week across every neighborhood.
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What's included
High security locks San Francisco price: from $180
High security lock installation: $180–$360, depending on the brand and cylinder. Plus a $29 service call. You get the exact price on the phone before we come. Call Now: (415) 205-5718
A standard deadbolt can be picked in under 30 seconds. That is the uncomfortable truth most San Francisco property owners never hear until after a break-in. If you need a Mul-T-Lock car cylinder for your vehicle or high-security deadbolts for your home and business, the problem is not a lack of security awareness. It is a lack of the right hardware. Mul-T-Lock for cars delivers the same telescoping pin-in-pin security to your ignition and door locks that Mul-T-Lock brings to commercial buildings.
Ace Locksmith SF installs high-security locks from Medeco, Mul-T-Lock, Abloy, and Schlage Primus that are independently tested to resist picking, bumping, drilling, and unauthorized key duplication. We also specialize in Mul-T-Lock car lock upgrades for vehicle owners who want the same level of protection on the road. For any lock that needs repair or replacement after an upgrade, our lock repair and replacement team handles the job in the same visit. If you'd rather start with a standard deadbolt lock and upgrade later, that's a straightforward path too. Call (415) 205-5718 for a free security assessment.
A high-security lock exceeds ANSI/BHMA Grade 1 standards and holds UL 437 listing. It features pick-resistant pin mechanisms, drill-proof hardened steel inserts, and patented restricted keyways that prevent unauthorized key copies. Brands like Medeco and Mul-T-Lock are the industry benchmark.
We are San Francisco's trusted high-security lock specialists, available 7 AM–11:30 PM, 7 days a week at (415) 205-5718. Our licensed technicians carry factory-trained certifications for Medeco, Mul-T-Lock, Abloy, and Primus. We provide free on-site evaluations with honest recommendations tailored to your property.
What is the best high security lock?
There is no single best lock. The four brands we install are all high-security cylinders with patented, restricted keys. The right one depends on the door and on who needs keys.
| Brand | How it resists attack | Best fit |
|---|---|---|
| Medeco | Angled cuts: pins must lift and rotate to the correct angle | Storefronts and offices that want the most common US commercial standard and wide hardware support |
| Mul-T-Lock | Telescopic pin-in-pin design | Residential front doors and small businesses that want strong pick and bump resistance at a lower cost |
| Abloy | Rotating discs instead of pins, no springs | Exposed or harsh locations and high-risk doors |
| Schlage Primus | Second side-bar locking system inside a Schlage cylinder | Buildings that already run Schlage hardware and want to upgrade without new locks |
Installed cost in San Francisco is $180–$360 per lock, plus a $29 service call.
Best high security lock for a front door
For a home or small-business front door we usually recommend a grade 1 high-security deadbolt from Mul-T-Lock or Medeco, installed with a reinforced strike and long screws into the frame. If the door already has Schlage hardware, a Schlage Primus cylinder upgrades it without changing the lock. The lock stops picking and bumping; the strike and frame stop the door being kicked in, so both matter.
Are high security locks worth it?
Yes, when the key matters as much as the lock: storefronts, offices with staff turnover, rentals, and any door where an unauthorized copy is the real risk. Restricted keys cannot be duplicated at a hardware store. For a single low-risk interior door, a quality grade 1 deadbolt is usually enough.
Storefront security checklist
- UL 437 listed cylinder with restricted keys
- Latch guard to block prying at the gap
- Reinforced strike and long screws into the frame
- Narrow-stile hardware that fits aluminum and glass doors
- Key control log: who holds which key
High security locks San Francisco: top brands we install
Not all high-security locks are created equal. Each brand engineers protection differently. Here is what sets the leading manufacturers apart and why our technicians are certified to install every one of them.
Medeco
Medeco has been an American security standard since 1968. Their patented rotating pin-tumbler design requires the correct key to both lift and rotate each pin to the precise angle. Medeco locks are UL 437 listed for forced-entry resistance.
The restricted keyway system means duplicates can only be made through authorized Medeco dealers with verified ownership cards. This eliminates the risk of a disgruntled former tenant or employee copying a key at a hardware store.
Mul-T-Lock
Mul-T-Lock's signature innovation is the telescoping pin-in-pin mechanism. Each pin contains a smaller pin inside it, effectively doubling the number of shear lines a picker must defeat. Mul-T-Lock cylinders are built to resist picking well beyond standard pin-tumbler locks.
Their Interactive+ line adds a floating ball bearing inside the key, creating yet another authentication layer. It is a favorite for commercial tenants in San Francisco's Financial District and SoMa who need robust access control. Many vehicle owners also choose a Mul-T-Lock car cylinder to prevent ignition theft and unauthorized key duplication on their automobiles. Mul-T-Lock vehicle security is particularly popular among owners of luxury and high-value cars who want factory-level protection without relying on a dealership. Our automotive locksmith team installs Mul-T-Lock car upgrades on-site across San Francisco, and if your ignition cylinder itself needs work, that same visit can cover ignition repair in San Francisco.
Abloy
Finnish-engineered Abloy locks use a rotating disc mechanism with zero springs. Because there are no traditional pins, conventional picking tools are useless. Abloy Protec2 cylinders carry both UL 437 and the Finnish VTT security certification.
The disc-detainer design also makes these locks exceptionally durable in coastal environments. San Francisco's fog and salt air corrode standard pin-tumbler locks faster than most owners realize. Abloy handles it effortlessly.
Prefer keyless convenience with high-security hardware underneath? Ask about a 7 AM–11:30 PM, 7 days a week smart lock locksmith install using a Grade 1 certified body, or read our smart door lock vs traditional comparison before deciding.
Schlage Primus
Schlage Primus adds a secondary sidebar locking mechanism to an already Grade 1 cylinder. Primus keys feature a unique finger-pin system along the blade's side, creating over 2 billion possible key combinations. Duplication is restricted exclusively to factory-authorized Primus dealers.
This brand is widely specified by property management companies across San Francisco for multi-unit residential buildings. It integrates directly with Schlage's commercial hardware ecosystem.
Ready to upgrade your property's security? Our technicians bring every major high-security brand on the truck.
Best pick-resistant and bump-proof lock features in San Francisco
What actually stops a break-in at the door? It comes down to three measurable security features. Understanding them helps you make an informed decision rather than relying on marketing claims.
Pick resistance ratings
Standard locks can be picked with basic tools purchased online for under competitive rates. High-security locks are engineered to defeat these tools entirely. UL 437 certification requires a lock to withstand sustained expert picking before it can pass. Medeco, Mul-T-Lock, and Abloy all surpass this threshold.
The mechanisms vary. Medeco uses angled pin rotation. Mul-T-Lock uses nested pins. Abloy eliminates pins altogether with rotating discs. But the result is the same: your lock holds.
Key control
Here is something most people overlook. A strong lock means nothing if anyone can walk into a hardware store and copy the key. Key control solves this vulnerability completely.
Unauthorized key duplication is a real, avoidable risk for any property that hands out uncontrolled keys. Patented restricted keyways from Medeco, Mul-T-Lock, Abloy, and Primus require factory authorization and an ownership verification card before a single copy is made.
Bump-proof engineering
Lock bumping uses a specially cut key and a mallet to momentarily jar all pins to the shear line simultaneously. It works on most standard pin-tumbler locks in seconds. It is quiet, fast, and leaves almost no evidence.
High-security locks defeat bumping through secondary locking elements. Medeco's pin rotation, Mul-T-Lock's inner pins, and Abloy's springless discs all render bump keys ineffective. UL 437-listed cylinders are tested specifically to resist bump-key attacks.
Top-rated residential and commercial high-security solutions in San Francisco
Your home and your business face different threats. The lock solution should reflect that difference. We tailor every installation to the property type, traffic volume, and access requirements.
Residential high-security installation
For San Francisco homes, condos, and apartments, we most often install Medeco Maxum deadbolts and Mul-T-Lock Hercular cylinders. These retrofit into standard door preparations with minimal modification. The average residential installation takes 30 to 45 minutes per door.
We evaluate your door material, frame condition, and strike plate. A high-security lock on a weak frame is a wasted investment. That is why every residential visit includes a full entry-point assessment at no extra charge.
Neighborhoods with older housing stock, like the Haight, the Richmond, and the Sunset, often require additional frame reinforcement. We carry reinforcement kits on every service vehicle.
Commercial high-security installation
Office buildings, retail stores, restaurants, and warehouses need hardware that withstands heavy daily use while maintaining strict access control. Commercial-grade high-security cylinders are rated for 1 million+ open/close cycles, compared to roughly 200,000 for standard hardware.
We design and implement master key systems that give building managers universal access while restricting employees and tenants to their designated areas only. This is especially valuable for San Francisco's multi-tenant commercial spaces.
For businesses requiring audit capability, we install high-security cylinders paired with electronic access systems that log every entry by user and timestamp. You know exactly who entered and when.
If you need one deadbolt or a full commercial master key system, we have the hardware and the expertise.
Why San Francisco properties demand high-security hardware
San Francisco is a world-class city, but it also presents real security challenges. Property crime is a real concern for San Francisco homes and businesses. Many more go unreported.
But here is what the data does not show. The vast majority of successful break-ins exploit standard-grade hardware. A Grade 3 residential lock, the kind found on most San Francisco doors, offers minimal resistance to forced entry.
Upgrading to high-security locks is not about fear. It is about making a calculated decision to protect what matters most to you. Your family. Your employees. Your inventory. Your vehicle. A Mul-T-Lock car cylinder is one of the most effective anti-theft upgrades you can make for your automobile, while a high-security deadbolt protects your home. Installing Mul-T-Lock for cars restricts who can duplicate your vehicle keys just as strictly as a patented residential keyway restricts home key copies. A single high-security deadbolt or Mul-T-Lock vehicle security upgrade costs a fraction of what a break-in costs you. A single high-security deadbolt or Mul-T-Lock vehicle security upgrade costs a fraction of that.
Frequently asked questions about high-security lock installation
What makes a lock "high-security"?
A high-security lock meets or exceeds ANSI/BHMA Grade 1 standards and includes features such as pick-resistant pin configurations, hardened steel inserts to resist drilling, restricted keyways with patented key control, and anti-bump technology. Brands like Medeco, Mul-T-Lock, and Abloy are independently tested and UL 437 listed.
How much does high-security lock installation cost in San Francisco?
Costs vary based on the lock brand, number of doors, and whether the door or frame needs reinforcement. Ace Locksmith SF provides free on-site assessments so you receive an accurate quote before any work begins. Call (415) 205-5718 for a personalized estimate.
Is Medeco better than Mul-T-Lock?
Both are excellent. Medeco uses a rotating pin-tumbler mechanism, while Mul-T-Lock uses a telescoping pin-in-pin design. For automotive applications, Mul-T-Lock car cylinders are often the preferred choice due to their compact form factor: Mul-T-Lock car installations are faster and require less door modification than comparable residential deadbolt replacements. The best option depends on your specific security needs, door type, and budget. Our technicians help you compare both options on-site.
Can high-security locks be installed on existing doors?
Yes. In most cases, high-security locks can be retrofit into your existing doors. If additional drilling or reinforcement is needed, our technicians handle the entire process during the same visit.
What is key control and why does it matter?
Key control means that duplicate keys cannot be made without proper authorization. High-security lock brands use patented keyways and require an ownership card to order copies. This prevents unauthorized key duplication at hardware stores.
Are high-security locks bump-proof?
Leading high-security locks from Medeco, Mul-T-Lock, and Abloy are engineered to resist bumping. Their pin mechanisms include secondary locking elements that cannot be manipulated by bump keys.
How long does a high-security lock installation take?
A single lock installation typically takes 30 to 60 minutes. If door reinforcement or multiple locks are involved, the job may take longer. Our technicians provide a time estimate before beginning work.
Do you install high-security locks for businesses in San Francisco?
Yes. We install high-security locks for offices, retail stores, warehouses, and multi-tenant buildings across San Francisco. Commercial installations often include master key systems and restricted keyways for employee access control.
What is UL 437 certification?
UL 437 is an independent standard from Underwriters Laboratories that tests locks against picking, drilling, and forced entry for a minimum duration. Locks that pass receive UL 437 listing, confirming a high level of physical resistance.
Can I get a master key system with high-security locks?
Absolutely. Medeco, Mul-T-Lock, and Abloy all support master key configurations. This allows building managers to access all doors with one key while tenants or employees only access their assigned areas.
Do high-security locks work with smart lock systems?
Some high-security brands offer electronic or hybrid models that combine mechanical pick resistance with smart access features like Bluetooth, keypads, or audit trails. We can recommend compatible options during your consultation.
What neighborhoods in San Francisco do you serve?
We serve every San Francisco neighborhood including the Mission, Nob Hill, Pacific Heights, SoMa, the Sunset, Richmond, Marina, Castro, and more. Our mobile technicians reach you wherever you are in the city.
How do I know if my current locks are high-security?
Check the lock face or key for a brand name like Medeco or Mul-T-Lock. High-security keys usually have unusual grooves, angles, or dimples. If you are unsure, call us for a free assessment and we will identify your current hardware.
What is the warranty on high-security locks?
Most high-security lock manufacturers offer lifetime mechanical warranties. Medeco, Mul-T-Lock, and Abloy each back their products against defects. Ace Locksmith SF also guarantees our installation workmanship.
Are high-security locks insurance-approved?
Many insurance providers recognize UL 437-listed and ANSI Grade 1 locks as qualifying upgrades. Some policies offer premium discounts for verified high-security hardware. Check with your insurer for specific requirements.
Do you offer 7 AM–11:30 PM, 7 days a week high-security lock service?
Yes. Ace Locksmith SF operates every day until 11:30 PM, 365 days a year. If you need an emergency installation or a scheduled upgrade, call (415) 205-5718 any time.
Can a high-security lock be rekeyed or does it need full replacement?
Most high-security lock brands like Medeco and Mul-T-Lock support rekeying within their restricted keyway system. A qualified locksmith can rekey your high-security lock to work with new keys while keeping the same durable hardware. However, if the high-security lock cylinder shows wear or damage, full replacement is the better option for continued protection.
How does a high-security lock perform in San Francisco's damp coastal climate?
High-security lock brands are engineered for durability in harsh conditions. Abloy high-security lock cylinders use a springless disc-detainer mechanism that resists corrosion from salt air and fog. Medeco and Mul-T-Lock high-security lock models feature stainless steel and nickel-plated components that hold up well in San Francisco's coastal environment with proper annual maintenance.
Can I install a high-security lock on a rental property in San Francisco?
Yes. San Francisco tenants can install a high-security lock at their own expense under California Civil Code 1941.3, provided they give the landlord a copy of the new key. A high-security lock upgrade on a rental is a smart move because it adds pick resistance, bump protection, and key control that standard locks lack. Ace Locksmith SF handles high-security lock installations for renters regularly.
What should you do? common scenarios
Every property has different security needs. Here are the situations where high-security lock installation makes the most sense.
- You just purchased a home or condo in San Francisco. You have no idea how many copies of the existing keys are floating around. A full high-security rekey or lock replacement gives you complete key control from day one.
- You experienced a break-in or attempted break-in. Standard locks failed once. They will fail again. Upgrading to UL 437-listed hardware closes the vulnerability permanently.
- You manage a commercial building with employee turnover. Every departing employee with a copied key is a potential security gap. Restricted keyways and master key systems solve this without changing locks after every departure.
- Your insurance provider recommended a lock upgrade. Many San Francisco insurers offer premium reductions for verified high-security hardware. The installation can pay for itself within the first policy year.
- You store high-value inventory or equipment on-site. Server rooms, jewelry, pharmaceuticals, art collections. The stakes demand hardware that matches the value behind the door.
No matter your situation, the first step is the same: a free, honest security assessment from a licensed professional.
Preparation guide: before and after your installation
Before your appointment
- Identify all entry points. Walk through your property and list every exterior door, side gate, and garage entry that may need upgraded hardware.
- Note your current lock brands and types. Check each existing lock for brand names, model numbers, or any visible markings. Photograph them if possible.
- Measure door thickness. Use a tape measure on the edge of each door. Standard residential doors are 1-3/8 to 1-3/4 inches thick. Commercial doors may be thicker.
- Decide on access requirements. Determine how many people need keys, whether you want a master key system, and whether electronic access integration is desired.
- Clear the work area. Move furniture, planters, shoes, or any items away from each door so the technician has full, unobstructed access to both sides.
- Gather all existing keys. Collect every key for your current locks. This helps the technician remove old hardware efficiently and confirms which keys will be retired.
- Check your door and frame condition. Look for warping, rot, or damage around the strike plate area. Mention any issues when you schedule so we bring the right reinforcement materials.
After your installation
- Test every lock immediately. Insert the key, turn the bolt, and confirm smooth operation from both inside and outside before the technician leaves.
- Store your key control card securely. This card is required to order duplicate keys. Keep it in a safe or lockbox, not in a drawer near the front door.
- Distribute keys deliberately. Only provide copies to people who genuinely need physical access. Keep a written log of who holds each key.
- Dispose of old keys. Do not keep old keys that fit locks no longer in use. Cut them or discard them to avoid confusion.
- Schedule a follow-up check. After 30 days of use, have us verify bolt alignment and lubricate the cylinder if needed. This extends the life of your investment.
High-security lock glossary
- ANSI/BHMA Grade 1
- The highest commercial-grade rating from the American National Standards Institute and Builders Hardware Manufacturers Association. Requires a lock to withstand 800,000 cycles and specific forced-entry resistance.
- UL 437
- An Underwriters Laboratories standard that tests lock cylinders against picking, drilling, pulling, and other attack methods for a defined minimum duration. Passing earns UL 437 listing.
- Restricted Keyway
- A patented key profile that cannot be duplicated without manufacturer authorization and an ownership verification card. Prevents unauthorized copies at retail key-cutting machines.
- Pin-in-Pin (Telescoping Pin)
- Mul-T-Lock's mechanism where each driver pin contains a smaller independent pin inside it. This doubles the shear lines and makes picking exponentially harder. The same technology is used in Mul-T-Lock car cylinders for automotive applications.
- Rotating Disc Cylinder
- Abloy's lock mechanism that uses flat rotating discs instead of spring-loaded pins. Because there are no springs, traditional picking tools and bump keys have no effect.
- Sidebar Mechanism
- An additional locking bar (used in Schlage Primus and some Medeco models) that must align correctly alongside the primary pins before the lock will turn. Adds a second layer of pick resistance.
- Key Control Card
- A physical authorization card issued with high-security locks. The card number must be presented to an authorized dealer to order duplicate keys, ensuring only the lock owner can authorize copies.
- Master Key System
- A hierarchical keying arrangement where individual keys open only their assigned lock, but a master key opens all locks in the system. Used in commercial and multi-tenant properties for efficient access management.
- Bump Key
- A specially cut key used with a striking force to momentarily push all pins to the shear line simultaneously. Effective against most standard pin-tumbler locks but defeated by high-security mechanisms.
Your security starts at the door
High Security Locks San Francisco: Medeco, Mul-T-Lock, Abloy & Primus, keys that can't be copied. You have invested in your San Francisco property and your vehicle. A high-security lock from Medeco, Mul-T-Lock, Abloy, or Primus is the most cost-effective upgrade you can make to safeguard that investment, and a Mul-T-Lock car cylinder extends the same proven protection to your automobile. If you are asking about Mul-T-Lock for cars, Mul-T-Lock vehicle security for a fleet, or residential deadbolts, the answer is the same: certified installation by a licensed technician who knows the hardware.
Ace Locksmith SF has the factory training, the brand certifications, and the 7 AM–11:30 PM, 7 days a week availability to get it done right. We serve every neighborhood in the city from our base at 3675 24th St, San Francisco, CA 94110.
Call us today for your free security assessment.
High-security cylinder installation
Our high security cylinder installation service covers Medeco, Mul-T-Lock, Abloy, and Schlage Primus cylinders retrofitted into your existing door. If you also need high security key duplication San Francisco CA property owners rely on, we cut restricted keys on-site with proper ownership verification. Ask specifically about a Primus locksmith visit if Schlage Primus is already on your door: our technicians are factory-certified on that hardware.
Home security locksmith services
As a home security locksmith San Francisco residents and a home security locksmith near me search both lead to, we install and service high-security hardware on houses, condos, and apartments citywide. Need a security key cut for a restricted keyway? We handle that during the same visit, with the ownership card required for future copies. And for businesses that need more than a lock, our "business door security" team covers access control and storefront door repair.
How it works
Our simple process gets you the help you need quickly and efficiently.
Call us
Contact us 7 days a week, 7 AM-11:30 PM by phone or form
We arrive
Technician arrives in 15-20 minutes
Get a quote
Upfront pricing before we start
Problem solved
Expert service from a licensed locksmith
Frequently asked questions
Can a high-security lock be rekeyed or does it need full replacement?
Most high-security lock brands like Medeco and Mul-T-Lock support rekeying within their restricted keyway system. A qualified locksmith can rekey your high-security lock to work with new keys while keeping the same durable hardware. However, if the high-security lock cylinder shows wear or damage, full replacement is the better option for continued protection.
How does a high-security lock perform in San Francisco's damp coastal climate?
High-security lock brands are engineered for durability in harsh conditions. Abloy high-security lock cylinders use a springless disc-detainer mechanism that resists corrosion from salt air and fog. Medeco and Mul-T-Lock high-security lock models feature stainless steel and nickel-plated components that hold up well in San Francisco's coastal environment with proper annual maintenance.
Can I install a high-security lock on a rental property in San Francisco?
Yes. San Francisco tenants can install a high-security lock at their own expense under California Civil Code 1941.3, provided they give the landlord a copy of the new key. A high-security lock upgrade on a rental is a smart move because it adds pick resistance, bump protection, and key control that standard locks lack. Ace Locksmith SF handles high-security lock installations for renters regularly.
How much do high security locks cost in San Francisco?
High security lock installation runs $180–$360, plus a $29 service call, depending on the brand (Medeco, Mul-T-Lock, Abloy, Primus) and cylinder. We confirm the exact number before starting.
Can high security locks be picked?
Any mechanical lock can in theory be defeated, but UL 437 listed cylinders such as Medeco, Mul-T-Lock, Abloy and Schlage Primus are tested to resist picking, bumping and drilling far longer than standard locks. Their bigger advantage is key control: keys cannot be copied without authorization.
Are high security locks worth it?
Yes for storefronts, offices and rentals where unauthorized key copies are a real risk. Restricted keys cannot be duplicated at a hardware store. For a low-risk interior door, a grade 1 deadbolt is usually enough.
What is the best high security lock for a front door?
A grade 1 high-security deadbolt from Mul-T-Lock or Medeco with a reinforced strike and long frame screws. For doors with Schlage hardware, a Schlage Primus cylinder is an easy upgrade.
We believe in honest, upfront pricing. You’ll receive a clear quote before any work begins, with no hidden fees or surprise charges. Our prices are competitive, and we never charge extra for evenings, weekends, or holidays.
- Free estimates
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Call Now: (415) 205-5718
Licensed locksmith (#7929) · open 7 days a week, 7 AM-11:30 PM · 15–20 min response in SF