There might be 2-3cm errors due to manual measurement.Please allow slight error of measurement.Durable Material: Craft key rings are made of nickel-plated iron, not easy to and fade. Nice workmanship, smooth surface, will not scratch your hands and things.EASY TO USE: Each keychain has a separate jumper that simply connects the key, trim, pendant or any other accessory and requires no extra effort to open it. And the metal keychain is convenient to carry.DIY: You can attach beads, tiny dolls, or toy models to the jump rings, then attach them to metal keychain rings to make unique pendants or key chains for customers. Also perfect for those you do for .And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Meet Demands - Package includes 100 pieces of 1 "(25mm) metal keychain with 1" chain and 0.4 "diameter rings that will meet your needs for daily use or DIY projects .Widely application: split key chains with chain are widely used in daily life, such as making key chains from all knitted animals to raise funds for , school key chains, family key chains, pendants for phone, bag, wallet, etc.Includes：