North Carolina Locksmith Practice Exam

Which process involves obtaining key bittings where the bittings of change keys differ from those of the top master key?

1. Two Step Progression

2. Active Retainer

3. Total Position Progression

4. Three Column Progression

The correct answer is: Total Position Progression

The process of obtaining key bittings where the bittings of change keys differ from those of the top master key is referred to as Total Position Progression. This method allows locksmiths to create a hierarchical system of keys where master keys can operate multiple locks, while change keys are designed to function with specific locks only. In Total Position Progression, each pin stack within a lock corresponds to specific positions that allow for unique bittings on the change keys, thus ensuring enhanced security. By defining different bittings, it maintains a clear distinction between the master key and the change keys, which is essential in situations where access needs to be limited to certain areas while providing broader access to others. This method also emphasizes the importance of pinning configurations, as each level of key access can be controlled through the arrangement of pins, ensuring that only authorized individuals can utilize specific locks. This level of security is crucial in both residential and commercial settings where multiple access levels are necessary.