Check the listing for details. 20Pcs 20mm Spring O Rings Clasp Clip Trigger Snap Spring Keyrings Silver. Condition: New. Listed at 16.87 USD. Multi-functional spring clasps are widely used in daily life, mainly for key chains, bags, wallets, straps, lanyards, ribbons, etc., or for DIY craft accessories to hang crafts and decorations.SpecificationColor: Silver ToneMaterial: Zinc AlloyWire Diameter: 3.5mm / 0.14 inchInner Diameter: 12.5mm / 0.49 inchOuter Diameter: 20mm / 0.79 inchPacking List: 20Pcs x Metal Spring O RingsAdvantageThe round spring ring is made of zinc alloy material, the surface is electroplated, anti-rust, sturdy and durable, and has a long service life.Spring clip design, easy to open and close, quick release. The spring snap clip is lightweight and easy to carry.Instruction1. Choose the right size spring door O-ring.2. As a ring buckle, it is used for various key chains, bags, wallets, etc.