Name: Bicycle Plate Nail Dental Plate Screws GasketSize:12mm*2mmThickness:2mmGasket inner diameter:10mmMaterial: AlloyApplicable: Double disk change to single diskQuantity:10pcsPackage include:10pcs Dental Plate Screw Bolt WasherUses: When the double disc nail is used to install a single disc, the male nail will be too long, so that the wrench can not lock the nut, and the gasket can solve this problem.