Features: Great Keychain Kits: Package comes with 20 pieces split for key chain rings, 100 pieces open jump rings and 100 pieces screw eye pins that will meet your needs for DIY craft projects. Durable Material: These keychain rings are made of alloy with great workmanship, smooth surface and edge. Perfect Size: The split ring is approx.1" (25mm) in diameter with extension chain, the open jump ring is 3/8" (8mm) in diameter and the screw eye pin is 5/8" x 1/4" (10mm x 5mm). Easy to Use: Each for key chain ring comes with a separate jump ring and screw eye pin, so you do not need to buy additional parts. It's convenient for you to attach charms, pendant or other accessories on the bag. Multi-purpose Keyrings for Crafts: These keychain rings with jump rings and eye screw pins are for making your own keyrings, pendants, name tags, card hangers, arts, craft projects, etc. Specifications: Material: Alloy Sheep Eye Nails: Approx.10x5mm/0.39x0.19inch Split Ring: Approx.8mm/0.31inch for Key Ring: Approx.25mm/0.98inch Color: Gold/Silver Package Includes: 20 X for Key Ring 100 X Single Lap 100 X Sheep Eye Nails note: Please allow 1-2cm errors due to manual measurement,pls 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.