You can insert small plastic labels, it is appropriate to distinguish keys.The integrated metal ring room, it is easy to hang from key ring.Product name: Key ring with ID labelmaterial: plastic, metalEach measure 5 x 2 x 0.3 cm / 5.08 cm x cm (2.0 2.03 (0.8 (0.1 x 0.25 cm (BxPxA); keychain, diameter: 1.7 cm / 1.52 (0.6 cmMain color: RedWeight: 56gContent: 30 x ID-Keychain with labelOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.