North Carolina Locksmith Practice Exam 2025 - Free Locksmith Practice Questions and Study Guide

Question: 1 / 435

In key progression, which option corresponds to a process using four columns of key bitting array?

Four Column Progression

The process referred to as key progression involving four columns of key bitting array is accurately represented by the four-column progression. This process is designed to systematically arrange key cuts in a manner that facilitates the creation of various keys that will operate a specific lock.

In this context, a four-column progression uses four distinct variables or "columns" to define the possible cuts or depth of a key. Each column represents a position on the key, and by manipulating the depths in each column, a locksmith can generate multiple unique configurations. This method not only allows for the creation of several keys for a single locksmithing system but also aids in providing a higher level of security and control.

The other options, such as a five pin master key or change key, do not correspond to this specific structural approach. A block master typically relates to a more general type of master keying system rather than detailing progression with a specific number of columns. Thus, the correct choice clearly delineates the four columns utilized in the key bitting array process.

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Five Pin Master Key

Change Key

Block Master

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