North Carolina Locksmith Practice Exam 2026 - Free Locksmith Practice Questions and Study Guide

A master key system is designed to allow multiple levels of access through a set of keys, making it highly beneficial for organizations like schools, hotels, and office buildings. To expand such a system effectively, various key sections are utilized.

A multiplex key system is a configuration that incorporates multiple key sections or different types of keys, enabling a single master key to work across various locks. This system allows for a broad range of locks to be governed under a single master key while still providing distinct keys for specific areas or purposes. The versatility of the multiplex system allows locksmiths to create intricate designs that can cater to an expansive building or facility, enhancing security while simplifying access.

Other options present concepts relevant to locksmithing but do not specifically refer to the mechanism used to expand a master key system in the same comprehensive manner as a multiplex key system does. Key blanks are simply the physical keys before they are cut, while a composite keyway refers to a keyway that can accommodate more than one key section, and a neuter bow concerns a specific type of key design. However, they do not encapsulate the broader function of allowing for multiple differing key sections within a master key system.