Features: brand new and high quality 2 Bright Colors Available: the 10 rings are in 2 colors--Silver, Gold; each color 10 pcs. 4 Diameters to Choose: package icnludes 10 pcs O spring keyrings in 4 sizes--diameter 20mm, 25mm, 28mm and 33mm. Sturdy Material: These round locking carabiners are made of zinc alloy, making them light weight but durable. Sturdy and durable, open and close smoothly. Designed with built-in spring, easy to use and convenient to take. Uses: hanging for key, hanging backpack, hanging kettle, hanging pen, hanging toys, suitable for all kinds of toys / stationery / jewelry / electronics / clothing, etc. Specifications: Material: Zinc Alloy Color: Silver, Gold(optional) Style: Round Outer Diameter: 20mm/0.78in, 25mm/0.98in, 28mm/1.1in, 33mm/1.29in(optional) Inside Diameter:12mm/0.47in, 17mm/0.66in, 20mm/0.78in, 25mm/0.98in(optional) Package Includes: 1 Set Spring Ring Buckle(10 pieces) note: Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size.