These can be added to any pet tag or keychain. Clasp must be purchased along with tag or keychain, if not it will not be added. It may also be purchased alone.
Clasp might be slightly different variation than picture. It will still be same size and style.
In order for your tag to be more secure please attach tag directly to hoop. Locking clasp are very convenient, however, sometimes when used they can open unexpectedly causing pet tag to come off and possibly be lost or damaged.