North Carolina Locksmith Practice Exam

Which term refers to obtaining key bittings using cut possibilities in two columns?

1. Two Pin Master Key

2. Two Column Progression

3. Top Master Key

4. Active Retainer

The correct answer is: Two Column Progression

The term that refers to obtaining key bittings using cut possibilities in two columns is Two Column Progression. This method involves analyzing and utilizing the different cut depths from two columns, which allows locksmiths to calculate and predict possible change key or master key combinations. In the context of locksmithing, understanding key progression is crucial, as it facilitates the successful creation of master keys that can operate multiple locks while also allowing for individual change keys. This systematic approach enhances efficiency in key duplication and ensures that the locksmith can provide effective key solutions for varying locking systems. The alternative options, while related to locksmithing, do not accurately describe the method of key bitting analysis through columns. For instance, a Top Master Key refers to a key that can open several locks that are configured to operate with that specific key, while Two Pin Master Key would suggest a simplified master keying system usually focused on fewer pins. An Active Retainer typically pertains to components within locking mechanisms rather than a method of determining keying possibilities. Thus, Two Column Progression stands out as the correct terminology in this context.