Definitions for "Bitting"
The shaping or notching of a key blank to transform it into a key to operate its own lock or latch.
(n.) 1. The number(s) which represent(s) the dimensions of the key. (n.) 2. The actual cut(s) or combination of a key. Source: Lock Industry Standards and Training (LIST) Council
A bitting is the part of the key that actually engages the tumblers to activate the lock. Bittings are often represented as a code which instructs how a key is to be cut by a locksmith. The bitting is usually a series of integers (e.g. 372164) that is usually translated from a key code chart or from a bitting code list and the use of specially designed key machines.