Package includes 10 / 50 /100 pieces Stainless Steel split key ring connectors (Choose the quantity you need) Perfect for DIY Home/Car Key rings, Crafts，Key fobs and Fishing Outer Diameter x Single Circle Thickness: Approx. 5mmx0.5mm/6mmx0.5mm/8mmx0.7mm/10mmx0.7mm/12mmx0.8mm/15mmx1.2mm/20mmx1.2mm/25mmx1.5mm (Choose the size you need) Material: Stainless Steel Color: Silver.