Features: Set includes: A total of 400 pieces of keychain hardware will meet your needs for craft projects. Size:The split ring is about 1 inch in diameter, with a 1-inch extension chain, and the open jump ring has a diameter of 3/8 inch, which is very suitable for making keychain accessories. High quality: Made of alloy, excellent workmanship, smooth surfaces and edges, will not scratch your hands, exquisite workmanship, not easy to rust, long service life, can improve your craft level. Easy to use: The for key ring with chain is used with the open jump ring, so it is easy to connect to other thing, instead of trying to pry the last chain. DIY:The for key chain ring has an open jump ring and screw eye pins, which are widely used as connectors for DIY for key ring pendants, or lanyards, gifts and other handicraft decorations. Specifications: Material: Alloy Color: Gold/Silver for Key Ring: Approx.25mm/1inch Circle: Approx.25mm/1inch Note: Please allow 1-2cm errors due to manual measurement,Please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 100 X for Key Ring with Chain 100 X Split Ring 100 X Screw Eye Pins 100 X Crayfish Clasp