---
title: "Medeco vs Mul-T-Lock: 7 Real Differences (2026)"
description: "Medeco wins on brute force, Mul-T-Lock on key control. Compare $250-$500 installed costs, key duplication and service in South Florida. Call 1-866-776-6062."
canonical: https://www.us-locksmith.com/blog/medeco-vs-mul-t-lock/
---

# Medeco vs Mul-T-Lock: Which High-Security Lock Is Right for Your South Florida Home?

**David Cohen**Security Consultant, US Locksmith

Updated September 2026 · 9 min read

US Locksmith is a licensed (Lic #00443LK) locksmith company serving all of South Florida since 2004,
and an authorized installer of both brands. The Medeco vs Mul-T-Lock decision comes down to two questions: what are you defending against, and who needs to be able to cut a key. Medeco is the stronger choice against a kicked or drilled door and is far
easier to service locally. Mul-T-Lock is the stronger choice when you want absolute control over who can cut a key and
one key running every opening on the property. Below is how that plays out on real Miami-Dade, Broward and Palm Beach doors.

## What Is the Difference Between Medeco and Mul-T-Lock?

Medeco uses pins that must be lifted to the right height and rotated to the right angle before a sidebar releases.
Mul-T-Lock uses a telescoping pin-in-pin design, where a pin sits inside another pin and both must set. Both defeat
bumping and standard picking. The practical differences are key control, product range and how quickly you can get service.

| Factor | Medeco | Mul-T-Lock |
| --- | --- | --- |
| Mechanism | Angled rotating pins + sidebar | Telescoping pin-in-pin |
| Flagship residential deadbolt | Maxum | Hercular (MT5+) |
| Force resistance | Strongest in class | Very strong |
| Key duplication control | Signature and ID on file | Physical magnetic order card |
| Key appearance | Looks like a normal house key | Immediately recognizable |
| Local parts availability | Widest dealer network | Fewer stocking locations |
| Padlocks, cam locks, gates | Limited range | Full keyed ecosystem |
| Typical installed cost | $250–$450 | $280–$500 |

## Which Lock Survives a Forced Entry Attempt Better?

Medeco. The Maxum deadbolt is an ANSI Grade 1 lock built with hardened steel inserts and a one-inch throw, and it is
consistently ranked at the top for resistance to kicking, prying and drilling. The Hercular sits just behind it. If your
concern is a smash-and-grab through a front door, that gap matters more than any picking statistic.

Forced entry is what actually happens in most South Florida residential burglaries. Covert picking of a high-security
cylinder requires skill, tools and time in front of a door in daylight. A shoulder against a hollow jamb requires none of
that. This is also why the strike plate and jamb reinforcement matter as much as the cylinder itself — we cover that in
our guide to [the strongest lock types for residential doors](https://www.us-locksmith.com/blog/the-strongest-lock-types/).

### From the Field

On a 1960s Coral Gables front door last year, the homeowner had a
top-tier cylinder in a door frame with three-quarter-inch screws into soft pine. The cylinder was untouched after the
break-in attempt. The jamb was not. A $400 lock in a $4 frame is a $4 door.

## Which Key Is Harder to Copy Without Your Permission?

Mul-T-Lock, by a clear margin at the MT5+ level. Duplication requires the physical magnetic order card that shipped
with the system. Without that card in hand, an authorized dealer cannot cut a key at all. Medeco protects its blanks by
patent and requires ID and a signature against records held by the dealer, which is strong but human-dependent.

That difference decides real cases. A landlord in [Boca Raton](https://www.us-locksmith.com/boca-raton-locksmith.html)
turning over tenants twice a year, or a business owner who has had keys walk out with a former employee, is buying
process control, not metal. If that is your situation, read
[which high-security keys cannot be duplicated](https://www.us-locksmith.com/blog/what-high-security-keys-cant-be-duplicated/)
before you choose a platform.

## Why Do More South Florida Homeowners Ask for Medeco by Name?

Medeco has been the American high-security standard for over fifty years, and it shows in how customers talk about it.
When we quote high-security work, homeowners ask for Medeco by name several times more often than they ask for Mul-T-Lock, and that gap has been consistent for years. Many have seen the name on a bank door, a government building or a utility cabinet long before they needed one at home. Mul-T-Lock usually enters the conversation because we raised it, not because the customer did.

Familiarity is not a security feature, but it is not worthless either. Insurance adjusters, HOA architectural boards and
property managers recognize the name and approve it with fewer questions. On a condo association submission in
[Key Biscayne](https://www.us-locksmith.com/key-biscayne-locksmith.html) or Aventura, that can save a round of
paperwork.

## How Different Do the Two Keys Actually Look?

Very different, and it changes how people carry them. A Medeco key reads as an ordinary house key with cuts along the
top edge. A Mul-T-Lock key is unmistakable: dimples drilled into the flat face rather than notches on the edge.

There is a real argument on both sides. A distinctive key advertises that the door behind it is not a hardware-store
deadbolt, which deters an opportunist sizing up a building. A plain-looking key attracts no attention at a valet stand, a
gym locker or a contractor's key box. Clients who travel or hand keys to staff often prefer the discretion.

## Which Brand Can a Locksmith Get Faster in Miami-Dade or Broward?

Medeco, in most cases. More South Florida supply houses stock Medeco blanks, cylinders and deadbolts, so a same-day or
next-day replacement is realistic. Mul-T-Lock parts more often come by order, which pushes a lost-key job to two to five
business days once the order card is verified.

The supply side is what drives this. Medeco is simply easier for a technician to buy: more distributors carry it, order minimums are lower, and most South Florida shops keep common Medeco cylinders and deadbolts on the truck instead of ordering per job. Mul-T-Lock stock tends to sit with the dealers who have committed to the platform, and that is a shorter list across Miami-Dade and Broward. A brand your locksmith already carries is a brand you get served on faster.

This is the factor homeowners never think about until they need it. Losing the only key to a
[Mul-T-Lock cylinder](https://www.us-locksmith.com/multlock-locks.html) on a Friday afternoon is a different
weekend than losing a Medeco key. If a lockout would be genuinely disruptive — a rental turnover, a storefront, a home
you are about to leave for hurricane season — ask about lead times before you commit to a platform, and always order a
spare at installation.

## Are There Counterfeit Mul-T-Lock Keys and Cylinders?

Yes, and we see them in the field. The Mul-T-Lock key profile is visually distinctive enough that imitators copy the
look. The cylinder arrives with a similar face and a similar key silhouette but without the pin-in-pin internals, the
hardened pins or the registered key system that made the platform worth buying.

- **The key came with no order card.** A genuine MT5+ system ships with one. No card, no system
- **The seller was an online marketplace,** not a named dealer with a service address
- **The price looked like a bargain.** Authentic high-security cylinders do not discount to hardware-store levels
- **The key blank cuts easily on a standard duplicator** — the whole point of the platform is that it cannot

Medeco copies exist too, but far fewer. The angled-cut geometry is harder to fake convincingly, and the plainer key
profile is a less attractive target for imitation. If you inherited high-security hardware with a property and cannot
document where it came from, the safest move is a fresh cylinder rather than a
[rekey of the existing lock](https://www.us-locksmith.com/rekey.html).

## How Much Does Each One Cost Installed in South Florida?

A Medeco Maxum deadbolt runs $250 to $450 installed. A Mul-T-Lock Hercular runs $280 to $500. Retrofit cylinders that
drop into existing hardware cost less because there is no new deadbolt body and no door prep. Registered keys are priced
per key on both platforms.

| Work | Medeco | Mul-T-Lock |
| --- | --- | --- |
| Grade 1 deadbolt, supplied and installed | $250–$450 | $280–$500 |
| Retrofit cylinder into existing hardware | $150–$300 | $160–$320 |
| Additional registered key | $25–$55 | $35–$70 |
| Keying multiple doors alike (per extra door) | $90–$180 | $95–$190 |
| Small master key system (3–6 doors) | $650–$1,400 | $700–$1,600 |

Door condition drives more of the final number than the brand does. A warped slab, a mortise pocket cut for older
hardware, or an impact door with a narrow stile all add labor. We quote after seeing the opening. For a wider view of
whether the upgrade pays for itself, see
[whether high-end locks are worth the investment](https://www.us-locksmith.com/blog/are-high-end-locks-worth-the-investment/).

## Does Coastal Salt Air Change the Answer?

It changes the finish, not the brand. Locks tested to UL 437 must be built from corrosion-resistant material or carry a
finish that survives salt-spray testing, and both platforms meet that. What fails on oceanfront doors is the decorative
lacquer over polished brass, usually within two or three seasons.

On doors within a few blocks of the water in
[Miami Beach](https://www.us-locksmith.com/miami-beach-locksmith.html), Sunny Isles or Hollywood Beach, we specify
satin chrome or a stainless-look finish on either brand and budget for a cylinder service every few years. Inland in
Plantation or Weston, finish choice is cosmetic.

## Which One Should You Actually Choose?

Medeco vs Mul-T-Lock stops being a hard call once you name the problem you are solving rather than compare spec sheets. Four situations cover most South Florida
homes and small businesses:

| Your situation | Choose | Why |
| --- | --- | --- |
| Single-family home, worried about break-ins | Medeco | Best force resistance, fastest local service |
| Rental or property you hand keys out for | Mul-T-Lock | Order card makes unauthorized copies impractical |
| House plus gate, shed, pool cabinet on one key | Mul-T-Lock | Padlocks and cam locks share the keyway |
| Condo mortise door with HOA approval needed | Medeco | Broad retrofit range, name boards recognize |

For a business with staff turnover and several openings, the calculation shifts toward a keyed system rather than
individual locks. Our [commercial locksmith team](https://www.us-locksmith.com/commercial-locksmith.html) designs
master key systems on both platforms.

## Bottom Line

Choose **Medeco** if the threat you are protecting against is
a forced door, or if fast local parts and key service matter to you. Choose **Mul-T-Lock** if the threat is an
uncontrolled copy of your key, or if you want one key running the house, the gate and the padlocks. Both are a genuine
upgrade over a standard cylinder; the wrong choice is a $400 lock in an unreinforced frame. **US Locksmith** is an
authorized installer of both across Miami-Dade, Broward and Palm Beach. Call **1-866-776-6062** for an on-site assessment.

## Frequently Asked Questions

Which key is harder to duplicate without the owner's permission, Medeco or Mul-T-Lock?

Mul-T-Lock MT5+ is harder. Duplication requires the physical magnetic order card issued with the system, so even an authorized dealer cannot cut a key without it. Medeco relies on a signature and ID check against the dealer's records, which is strong but depends on the dealer following it.

Can one Mul-T-Lock key open my front door, gate padlock, and storage room?

Yes. Mul-T-Lock builds cylinders, padlocks and cam locks on the same keyway, so a single registered key can run the front door, side gate, pool equipment cabinet and a storage room. Medeco covers most door hardware well but has a narrower padlock and cam-lock range.

Why do I see imitation Mul-T-Lock keys and cylinders for sale online?

The Mul-T-Lock key profile is visually distinctive, which makes it a target for copies. We regularly see cylinders on South Florida doors that carry the look but not the internal pin-in-pin construction or the registered key system. Buying through an authorized dealer is the only reliable check.

How fast can a South Florida locksmith get a replacement Medeco or Mul-T-Lock key?

Medeco is usually faster. More local supply houses stock Medeco blanks and cylinders, so a replacement key is often same-day or next-day. Mul-T-Lock replacements typically take two to five business days because the order card has to be verified and the blank ordered.

Which brand holds up better on a coastal door in Miami Beach or Sunny Isles?

Both perform well when the right finish is specified. UL 437 requires corrosion-resistant construction or a finish that survives salt-spray testing. On oceanfront doors we specify satin chrome or stainless-look finishes over polished brass for either brand, because brass lacquer fails first in salt air.

## Get a High-Security Lock Assessment

We install and service both platforms across Miami-Dade, Broward and Palm Beach County. Licensed (#00443LK), bonded and insured.

[Call 1-866-776-6062](tel:18667766062)

The attack-resistance testing referenced above is defined in
[UL 437, the standard for key locks](https://standardscatalog.ul.com/standards/en/standard_437_8).

#### David Cohen

Security Consultant, US Locksmith

I have specified and installed high-security cylinders on South Florida doors since 2004, from oceanfront condos in Sunny Isles to storefronts in Hialeah. Most of what I know about these two platforms came from servicing them years after installation.