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Which tool is often employed to align the pins when reassembling a lock?

  1. Plug Holder

  2. Plug Follower

  3. Pin Gauge

  4. Tumbler Tool

The correct answer is: Plug Holder

The correct answer is the plug holder, which is a tool specifically designed to assist locksmiths in the precise reassembly of locks. When reassembling a lock, it is crucial to keep the pins aligned within the plug to ensure that the lock functions correctly. A plug holder securely holds the plug in place while the locksmith inserts the pins, preventing them from falling out of alignment. This tool provides stability and makes the reassembly process smoother, reducing the risk of damage to the internal components. While other tools mentioned can serve important functions in locksmithing, they do not primarily focus on aligning the pins during reassembly. For instance, the plug follower is primarily used to remove the plug from the cylinder without losing the pins, and the pin gauge is utilized to measure and sort pins by size. The tumbler tool is designed for testing or manipulating tumblers in some context but does not play a role specifically in aligning pins when reassembling a lock. Therefore, the plug holder is the most appropriate choice for this purpose.