Features: Set includes: A total of 400 pieces of keychain hardware to meet your needs for craft projects. Size: The split ring is about 1 inch in diameter, with a 1-inch extension chain. The open jump ring has a diameter of 3/8 inch, suitable for making keychain accessories. High quality: Made of alloy with excellent workmanship, smooth surfaces and edges that will not scratch your hands. Resistant to rust with a long service life, helping enhance your crafting experience. Easy to use: The key ring with chain can be used with the open jump ring, allowing easy connection to other items without prying open the last chain link. DIY: The key chain rings come with open jump rings and screw eye pins, widely used as connectors for DIY keychain pendants, lanyards, gifts, and other craft decorations. Specifications: Material: Alloy Color: Gold/Silver Key Ring Diameter: Approx. 25mm / 1 inch Chain Length: Approx. 25mm / 1 inch Note: Please allow 1-2 cm errors due to manual measurement. Ensure you are comfortable with this before ordering. Due to differences in monitor displays, the image may not reflect the actual color of the item. Package includes: 100 x Key Ring with Chain 100 x Split Ring 100 x Screw Eye Pins 100 x Crayfish Clasp