Most forums say dial locks are safer. That's not what the UL certification data shows — and most buyers are choosing based on the wrong factor entirely.
Norcal Safe and Vault has sold Liberty electronic and dial locks side by side for 30 consecutive years — because the right choice depends on your situation, not on which type is inherently “safer.”
A quality electronic lock is as secure as a quality dial lock. The certification determines security equivalence — not the operating mechanism.
The myth says electronic locks are weaker because they can fail or run out of battery. That reasoning mixes up two different things: security and reliability. Security is about keeping unauthorized people out. Reliability is about how often the lock performs correctly for you. They measure different things.
Both measure security the same way. UL 2058 Type 1 is the standard for electronic locks. UL 768 Group 2M is the standard for mechanical dials. Both test resistance to manipulation, drilling, and forced entry — the same attacks, the same performance requirements. A safe fitted with a UL 2058 Type 1 electronic lock and a safe fitted with a UL 768 Group 2M dial lock are equally resistant to unauthorized entry.
What the forums get wrong is this: when the battery dies, it does not let anyone into your safe. It creates a brief access inconvenience for you, with a simple solution. A flat battery is not a security failure. It is a usability failure. Those are not the same problem.
Lock type selection is a usability and reliability decision. Here is how those dimensions break down.
Underwriters Laboratories runs two separate certification programs for safe locks. UL 2058 covers electronic locks. UL 768 covers mechanical locks. Both test resistance to the same general categories of attack.
The specific tiers that matter for residential buyers are UL 2058 Type 1 and UL 768 Group 2M — the security tiers commonly found on residential gun safes, home safes, and mid-range fire safes from brands like Liberty, AMSEC, and Fort Knox.
The residential security tier for electronic locks. Testing includes manipulation resistance, attack resistance to common tools, and operational reliability across a defined cycle count. The lock must resist bypass attempts using electronic manipulation techniques, physical probing, and contact methods.
The residential security tier for mechanical dials. Testing covers manipulation resistance, attack resistance, and environmental durability. The lock must resist combination probing, drilling, and physical attack using common tools.
Both certifications require the lock to resist unauthorized entry using the same general attack categories. A manufacturer does not get a UL listing by passing easier tests because the lock happens to be electronic. Both standards are administered by the same organization, in the same security context, with equivalent pass thresholds at their respective tiers.
The concern goes like this: if the battery in an electronic lock dies, the safe cannot be opened, leaving your contents inaccessible — therefore electronic locks are less safe.
The reasoning has a flaw. Battery death prevents you from opening your safe. It does not give anyone else access. The security of the contents is not compromised. More importantly, modern electronic locks have backup access mechanisms specifically designed for this situation.
Most UL 2058 electronic locks include an external 9V battery contact on the outside of the door. When your internal battery is dead, hold a fresh 9V battery against the contacts — that provides enough power to enter your combination and open the safe. It is typically visible on the lock face or keypad housing.
UL 2058 Type 1 certification requires a physical key override — a standard key cylinder installed on the lock that opens the safe regardless of battery status. The override key is typically stored separately from the safe, for obvious reasons.
Battery failure is a 30-second inconvenience with a known solution. It is not a security event.
Covers backup access mechanisms by lock type, expected battery life by brand, and exactly what to do right now if you're facing a dead panel.
Read the GuideOnce the security myth is off the table, the choice comes down to reliability preferences and use patterns. Here is how we think about it after 30 years of guiding NorCal buyers through this decision.
A direct calibration on EMP protection: who needs it, who doesn't, and what it actually costs.
Read the GuideThere is no universally correct choice. The security outcome is identical when UL certifications are equivalent. Choose based on how you will use the safe.
Apply what you just learned to any product listing you're evaluating. Two checks tell you what you need to know about the lock.
Look for UL 2058 (electronic) or UL 768 (mechanical) on the product spec sheet. If the listing doesn't name a specific UL standard, the lock may be manufacturer self-rated rather than third-party certified. Self-rated locks can be fine at the budget tier, but they are not the same as certified locks. Ask for the specific certification number.
The safe body and the lock are manufactured separately. Common quality residential lock brands include Sargent & Greenleaf, La Gard, and Simplex. Liberty Safe uses quality electronic and S&G locks depending on the model tier; Fort Knox ships with both; AMSEC uses S&G on most models. Generic or unbranded locks are more common on budget-tier safes and carry more variability.
Have a safe in mind?
Bring the model number — we'll look up the lock spec and tell you exactly what you're getting.
Yes, when both carry equivalent UL certifications. A UL 2058 Type 1 electronic lock provides the same resistance to unauthorized entry as a UL 768 Group 2M mechanical dial. Both are tested by Underwriters Laboratories against the same general attack categories at their respective residential tiers. The idea that electronic locks are inherently less secure is a myth based on confusing battery reliability with security performance.
UL 2058 is the Underwriters Laboratories standard for electronic safe locks. UL 768 is the UL standard for mechanical dial locks. Each standard has internal tiers — Type 1 (electronic) and Group 2M (mechanical) are the tiers commonly found on residential safes. Both require the lock to resist manipulation, drilling, and physical attack. At these equivalent tiers, both standards require the same general level of security performance.
You will not be locked out permanently. Most UL 2058 electronic locks include an external 9V battery contact: hold a fresh battery against the contacts on the lock face, enter your combination, and the safe opens. Many locks also include a physical key override. Battery death creates a brief inconvenience with a known solution — it does not create a security failure.
Choose electronic if you access the safe frequently, need multiple user codes, or prefer speed. Choose mechanical if you want zero-maintenance long-term reliability or if EMP protection matters to your situation. The security outcome is identical when both carry equivalent UL certifications. The decision is about usability and reliability preferences, not which type better protects the contents of your safe.
A quality mechanical dial can operate for decades with minimal maintenance because it has no electronics to fail. A quality electronic lock requires periodic battery replacement and has a higher number of electronic components that can theoretically fail over time. In practice, both have very long service lives when maintained. If maximum long-term reliability with zero active maintenance is your priority, a mechanical dial has the advantage in that specific dimension.
West Sacramento · San Jose · 30 years of honest advice, no sales pressure
This guide is part of the series: How Safe Features Work
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