Combination Safes: Dial Locks, Ratings and the Trade-Offs

A combination safe opens with a dial, not a battery

A combination safe uses a mechanical combination lock: a dial on the door that turns a set of wheels inside the lock. Dial the right numbers, in the right order and direction, and the gaps in the wheels line up so the bolt can retract. No electronics are involved. Listings also call them dial safes, mechanical safes or mechanical combination safes.

Our table on this page includes home safes, fire safes, wall safes and floor safes we track whose lock types include a mechanical dial. Many have a dial alone. Some pair it with a key, which locks the dial or the handle as a second step. Gun safes with dial locks are on a separate page, mechanical gun safes. Safes with electronic keypads are on the digital safes page, and key-only safes are on safes with key.

The term "combination safe box" sometimes appears on small lock boxes with a few numbered thumbwheels. Those are combination locks too, but a different kind from the dial on a safe door. Read the lock description, not the product name.

Who should choose a dial safe, and who should skip it

A mechanical combination safe suits owners who open the safe occasionally and want a lock that doesn't depend on batteries or electronics. It suits safes that sit in a basement, garage or vacation home, where a dead battery or humidity could be a problem for electronics. It also suits buyers who want a lock with an established, testable rating: UL 768 covers mechanical combination locks specifically.

Liberty Safe's summary of the trade-off is fair to both sides. Mechanical locks need no power, are durable with little upkeep, and have a long track record. They also take precision and patience to open, a wrong turn means starting over, and changing the combination usually needs a locksmith.

Skip a dial safe if:

• You'll open it many times a day. An electronic keypad is faster, and Liberty notes owners can change codes themselves.
• Speed matters most. For quick access, look at keypad or biometric models; a dial takes practice and good light.
• Reading small numbers is hard for you. Dialing accuracy is part of how a mechanical lock works.

What to look for in a combination safe: the lock rating, the safe rating, the paperwork

A dial lock is a quiet piece of machinery. It doesn't beep, blink or warn you about anything, which also means it won't tell you whether it was ever tested. That part is in the paperwork.

A UL 768 listing on the lock

UL 768 is UL's standard for combination locks used on safes and vaults. It tests a lock's resistance to being opened by sight, touch or hearing, which the trade calls manipulation. It covers mechanical locks only; electronic locks fall under other documents such as UL 2058.

UL 768 sorts locks into groups, such as Group 2, 2M and 1. The groups are referenced elsewhere: UL 1037 Level II residential security containers require a Group 2M lock or a UL 2058 electronic lock, and Level III requires Group 1 or UL 2058. I haven't been able to verify the test durations for each group from UL directly, so they aren't quoted here. If a listing names a UL 768 group, that's a useful, checkable detail.

The rating on the safe itself

A UL-listed lock is not a UL-rated safe. The lock was tested; the box around it may not have been. Look for separate ratings on the container:

• Burglary: a UL 687 class (such as TL-15 or TL-30), which applies to combination-locked safes, or a UL 1037 residential security container rating
• Fire: a UL 72 class and time rating, for example Class 350 for paper, ½, 1 or 2 hours

Our UL-rated safes page lists safes with a fire or burglary rating issued by UL. For gun owners in California, the state DOJ's gun safe standard calls for a combination lock with at least 10,000 combinations; that standard applies to gun safes, which are on the gun safe pages.

Living with a dial: practice and the change procedure

A dial lock rewards practice. Lock makers publish a turning procedure for each lock, and the directions and number of turns differ between makers, so your manual's procedure is the one to follow. Sargent & Greenleaf's guide to its mechanical locks advises checking a new combination at least three times before closing the safe door, so a mistake is caught while the door is still open.

Before buying, it's worth checking:

• Who made the lock — the safe brand and the lock brand can be different companies
• Whether the owner can change the combination, and what tool that needs
• Whether a dial-to-electronic conversion is supported later, if your needs change

The combination: where it comes from and where it goes

Every new combination safe ships with a factory combination. Some manufacturers print it in the owner's manual or on a label. Two habits save trouble later:

• Register the safe with the manufacturer. Liberty, for example, says registration creates an ownership record it can check if the combination is lost.
• Store the combination away from the safe, somewhere only the people who need it can find it.

If the combination is lost, the paths are the manufacturer (usually with proof of ownership) or a qualified safe technician. Liberty asks unregistered owners for a notarized request, and warns that bringing in a locksmith without contacting it first can void the safe and lock warranties. ALOA, the locksmith association, points owners who are locked out to safe technicians in its SAVTA division. Our guides cover how to open a combination safe and how to change a safe combination.

How to read the combination safe table

The table lists every home, fire, wall and floor safe we track with a mechanical dial among its lock types. Notes for reading it:

• "—" means not confirmed. The manufacturer didn't state it, or we couldn't verify it.
• Lock types shows the dial and any second lock, such as a key.
• Fire rating shows duration, temperature and who tested it. Rated (independent lab) and claimed (manufacturer) are labeled separately.
• Burglary rating shows a UL class or other named standard, when stated.
• Capacity is interior volume in cubic feet; sort by it if you need a large combination safe.

People searching for the best combination safe tend to mean "the most trustworthy dial safe for my things." The table can't answer that in one row, but it can narrow the field. Filter for the ratings you need first, fire or burglary or both. Then compare interior size and weight among what's left, and look for a lock maker or UL 768 listing in the manual. A combination safe for sale with no fire rating, no burglary rating and no lock listing is relying on the dial's reputation, not its paperwork.

Choosing a mechanical combination safe

Decide whether you need fire protection, burglary resistance or both, and filter the table for those ratings. Check the lock in the manual: who made it, and whether it carries a UL 768 listing. When the safe arrives, register it, store the combination away from it, and practice dialing with the door open. Then check the price on the models that pass.