The document provides a step-by-step guide on how to rekey a lock. It involves disassembling the lock by removing the lock chamber, replacing the current pins with a new set of pins corresponding to a new key, and reassembling the lock. Rekeying allows restricting access or upgrading security while reusing the existing lock components. The summary outlines the 7 steps of the rekeying process and the tools required, such as tweezers, a pinning kit, small screwdrivers and hex keys.