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Bitting refers specifically to the cut pattern on a key, which is essential for the key to operate a lock. The bitting is determined by the specific depths and positions of the cuts along the key's blade, which match the pins or levers inside the lock. This precision is what allows the key to correctly align the internal mechanism of the lock, enabling it to turn and unlock.

Understanding bitting is crucial for locksmiths, as it impacts key duplication and lock security. Variations in bitting patterns can affect how easily a lock can be picked or bypassed, making it a key concept in locksmithing that relates directly to both key design and overall lock functionality.