This Yale Lock code series is for VINTAGE TRUNKS and is a 4 Pin or 4 Cut Single Key. Not recommended for anything but very old applications. It uses an ILCO Y6 key blank/key way. All keys will come pre-cut to the specific lock code, ready to work in your lock. When in doubt, compare the line drawing of the keyway shown in the key example, to the face of your lock. It should match.