The M1 key blank is a common, uncut key for the Master Lock M1 series of padlocks and other compatible locks. Identified by the keyway number M1 or 1092, it is crafted from durable brass and designed for easy cutting by locksmiths. Ideal for duplicating lost keys or creating reliable spares, the M1 blank is a standard choice for many four-pin padlock systems, especially those with Master Lock’s 1K or M1 keyway.
