Features: Set includes: A total of 400 pieces of keychain hardware to meet your needs for craft projects. Size: The split ring is approximately 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 excellent craftsmanship. Smooth surfaces and edges will not scratch your hands. Resistant to rust for long-term use. Easy to use: The key ring with chain can be easily connected using the open jump ring, eliminating the need to pry open the last link. DIY: Includes open jump rings and screw eye pins, widely used as connectors for DIY keychain pendants, lanyards, gifts, and other handmade decorations. Specifications: Material: Alloy Color: Gold/Silver Key Ring Diameter: Approx. 25mm (1 inch) Split Ring Diameter: Approx. 25mm (1 inch) Note: Please allow 12 cm variation due to manual measurement. Ensure you are comfortable with this before ordering. Due to differences in monitor displays, the actual item 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 Lobster Clasps