General description The CSPARKV 100pcs Keychain Rings with Chain and Screw Pins set is perfect for crafting your own keychain accessories. This comprehensive kit includes a variety of sizes and components, making it ideal for DIY projects. Technical specifications Split ring sizes: 15mm, 20mm, 25mm, 30mm in diameter Extension chain length: 2.5cm Open ring diameter: 8mm Eyelet pin dimensions: 10mm x 5mm (length x width) Total pieces: 300 (100 key rings, 100 open jump rings, 100 key pins) Usage Convenient for attaching charms, pendants, or other accessories Ideal for making custom keychains, crafts, or gifts Other information Material: Iron with nickel plating for a shiny and smooth finish