UL Underwriters' Laboratories (UL) - UL is a non-profit, non-bias agency that tests and rates the safety and performance of consumer products. Safes that have earned specific UL ratings will carry a UL label which designates the product's security and fire-protection ratings.
Net Working Time - This is the UL term for testing time which is spent trying to break into a safe using tools such as diamond grinding wheels, high-speed drills with pressure applying devices, or common hand tools such as hammers, chisels, saws, and carbide-tip drills. If a safe has been rated with a 30-minute net working time, (TL30), the rating certifies that the safe successfully withstood a full 30 minutes of attack time with a range of tools.
Theft resistant - This rating means the safe provides a combination lock and minimal theft protection.
Residential Security Container rating (RSC) - This UL rating is based on testing conducted for a net working time of five minutes, on all sides, with a range of tools.
TL-15 rating - The TL-15 rating means the safe has been tested for a net working time of 15 minutes using high speed drills, saws and other sophisticated penetrating equipment.
TL-30 rating - A product carrying the TL-30 security label has been tested for a net working time of 30 minutes with the same types of tools mentioned above.
TL-30 x 6 - The TL-30 (30-minute) test is conducted on all six (6) sides of the safe.
TRTL-30 - The TRTL rating designates a safe which successfully resisted 30 minutes of net working time with a torch and a range of tools which might include high speed drills and saws with carbide bits, pry bars, and other impact devices.
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