Plug follower is a specialised tool used primarily by locksmiths to assist in the disassembly and reassembly of cylinder locks. It serves as a substitute for the lock's core, or plug, maintaining the alignment of the pin tumblers and springs in the housing of the lock during the servicing process. This cylindrical tool, usually made from metal or durable plastic, is essential in preventing the dislodged components from scattering, thus facilitating a smoother and more efficient repair or rekeying operation.
The design of a plug follower is tailored to match the dimensions of the lock being serviced, with variations in diameter and length to accommodate different types of cylinder locks. The material choice for a plug follower often reflects the required durability and non-reactivity with the lock’s internal mechanisms, with some advanced models featuring properties that resist wear and electrical conductivity. Locksmiths might select a specific plug follower based on the lock type, condition, and the precision required for the task, underscoring the tool's role in enhancing the efficacy of lock manipulation and maintenance tasks.