List of Lock Ratings

General Combination Lock Requirements

In addition to lock group specifics all combination locks must meet the following minimum criteria to be considered for a UL rating:

• Enable at least 1 000 000 combinations.
• Withstand 10 000 cycles of combination dialing at no more than 48 RPM.
• Withstand vibration at closest resonant frequency for 2 hours.
• Built using non corrosive materials.

Combination Lock Ratings (Ordered from lowest to highest level of protection)

1. Group 2: 
   • Some resistance to opening attempts.
   • Not suitable for any UL Rated safes.
2. Group 2M:
   • 2 hours resistance to expert attacks.
   • Used on TL-15, TL-15×6, and TL-30 safes.
3. Group 1:
   • 20 hours resistance to expert attacks.
   • Special construction techniques not found in other locks.
   • Can be found on any UL rated safe but must be used (or Group 1R used) on TRTL rated safes and TXTL rated safes.
4. Group 1R:
   • 20 hours resistance to expert attacks.
   • Resistance to radiological techniques (ie. X-rays). Synthetic polymers must withstand aging and humidity.
   • Special construction techniques not found in other locks.
   • Can be found on any UL rated safe but must be used (or Group 1 used) on TRTL rated safes and TXTL rated safes.