Classic Brass Keys are excellent quality with vintage style. These keys will turn some but not all antique locks. Key has a notched-end, known as the key-bit. This portion of key is critical. If the key bit is cut correctly it will turn lock-mechanism.
If key bit is not correctly notched it will not open and close lock. Key-bit profile varies according to individual lock. The key barrel is hollow, to slip onto lock pin. Lock pin must be slightly less than 1/8" for barrel to slip lock-pin.
Replacing keys for an existing lock is difficult
Before choosing a key blank:
Profile of key-bit varies between locks.
Selecting Keyhole Covers - Escutcheons
For accurate fit: