What is a group 2 combination lock?

A group 2 combination lock is a type of mechanical lock commonly used for high-security applications, such as safes and vaults. It features a rotating dial and a series of internal gears that engage when the correct combination is entered. The lock typically requires a specific sequence of numbers to align the internal mechanisms, allowing the user to unlock it. Group 2 locks are classified by the Underwriters Laboratories (UL) based on their resistance to unauthorized access and manipulation.