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, ideal for making keychain accessories. High quality: Made of alloy with fine craftsmanship, smooth surfaces and edges that will not scratch hands, resistant to rust, durable for long-term use. Easy to use: The key ring with chain can be easily connected using open jump rings, eliminating the need to pry open the last chain link. DIY: These keychain components include 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 actual color may vary slightly from the image. Package includes: 100 x Key Rings with Chain 100 x Split Rings 100 x Screw Eye Pins 100 x Crayfish Clasps