Want Keys Nobody Can Copy in Jacksonville? High-Security Locks from Medeco and Mul-T-Lock

What makes a lock high-security

A standard pin-tumbler lock, the kind on most front doors, can be picked or "bumped" with a specially cut key by someone who knows how. Its keys can be copied at any hardware store. High-security locks close those gaps.

• Pick and bump resistance. Extra locking parts, such as sidebars and pins that must lift and rotate, make the lock very hard to open without the correct key.
• Drill and force resistance. Hardened steel inserts protect the cylinder, and Grade 1 bodies stand up to prying and hammering.
• Key control. Keys are cut on patented blanks that aren't sold to the public. Copies are made only for people you authorize.
• Tested performance. Many high-security cylinders are listed to UL 437, a standard for resistance to picking, drilling and forced attack.

The brands we install

We install and service Medeco and Mul-T-Lock, two well-known high-security lines, along with Grade 1 locks from Schlage, Yale and Baldwin. Both high-security brands make cylinders that fit many standard locks, so an upgrade doesn't always mean new hardware.

Who high-security locks are for

• Landlords and property managers who hand keys to tenants, cleaners and vendors and need to know no copies exist. See property managers and realtors.
• Businesses with staff turnover, cash, stock, medicine or records. High-security cylinders work well as the top level of a master key system.
• Homeowners with a detached garage, workshop or storage building, or anyone who wants the strongest front door lock available.
• Homes with household staff, caregivers or contractors coming and going.

Key control: why it matters

A key stamped "Do Not Duplicate" is a request, not a guarantee. Many shops copy it anyway. With a patented key:

• Only authorized dealers can get the blanks.
• Copies need your permission, usually an ID card or signature on file.
• You always know how many keys exist, so you know when a lost key is a real risk.

When a key does go missing, the system can be rekeyed like any other lock. For everyday keys, see key duplication.

Salt air and your hardware: our "Distance from Ocean" guide

Jacksonville has two very different lock climates. East of the Intracoastal Waterway, salt air settles on everything. It pits thin plating, builds corrosion inside cylinders, and can freeze a lock in a few seasons. Inland, humidity is the main enemy, and standard quality hardware lasts well.

We match the hardware to where you live:

BHMA rates the finish on newer residential locks from A to C, testing against salt, humidity and sun. For a beach house, look for A. Whatever the lock, a fresh-water rinse now and then and a dry lock lubricant once or twice a year add years to coastal hardware.

Do you need high-security, or just a better install?

Honest answer: many break-ins don't involve picking at all. Most forced entries attack the door frame. A high-security cylinder on a door with a weak strike is only half an upgrade. We often pair high-security locks with door reinforcement: a heavy strike plate and long screws that reach the wall framing. If a quality deadbolt and a reinforced frame meet your needs, we'll tell you that instead.

How an upgrade works

1. We talk through your needs: key control, pick resistance, or both, and how many doors.
2. We check your existing locks to see which can take a high-security cylinder.
3. We order or supply the cylinders and set up your key record, if it's a key-control system.
4. We install, align and test each lock, and register your authorized key holders.
5. You get your keys, your key card and an itemized invoice.

Our lock installations are backed by a 5-year money-back guarantee.

What it costs

High-security locks cost more than standard locks, because the cylinders and keys are made to tighter tolerances and the key blanks are controlled. The total depends on:

• Retrofit or new lock. Swapping a cylinder costs less than a full lock.
• The brand and line, and whether you want key control.
• The number of doors, and whether they're keyed alike or into a master system.
• Extra keys, which are cut only for authorized holders.

You get the full price on the phone before we drive out, and we confirm it before any work starts. See our pricing guide.

Where we install high-security locks

We install high-security locks across Jacksonville, including beach homes in Ponte Vedra Beach and Jacksonville Beach, and offices in Southside. See all our commercial locksmith services.

Want keys nobody can copy? Call (904) 509-0907 or text us your question. We're available Mon & Fri 7 AM–2 PM and Tue & Thu 7 AM–6 PM.