Quantity: 50 x split key rings with chain, 50 x mini open jump rings, and 50 x screw eye pins; 150 Pieces keychain findings in total, enough for crafts DIY needsSizes (approx.): each round split ring is 25 mm in diameter with 25 mm long link chain, the open jump ring is 8 mm in diameter, and the screw eye pins is 10 x 5 mm (LW)Use simple: the keychain rings with chain and connectors are convenient for you to attach your keys, charms, pendants or other accessories on, durable key rings can hold these accessories tightlyTo DIY your own crafts: you can attach beads, tiny dolls, toy models, mini cubes or tags onto the jump rings, them attach them to the key chain rings to make unique pendantsMulti-purpose: these keychain rings with jump rings and eye screw pins are for making your own keyrings, pendants, name tags, card hangers, arts, craft projects, etc.