DIY Supplies : Metalworking is_customized : Yes Model Number : Polishing Grinding Wheel Type : Abrasive Disc Hole Aperture : 25.4mm Diameter : 150mm 1pcs Diamond Resin Soft Grinding Polishing Wheel 280 to 3000 Grit For Gem Jade Glass Crystal Intraocular Lens Machining Tools Hole Aperture: 25.4mm Size: 150 * 38mm Scope of application: Shaped processing of workpieces such as jade, crystal, glass, and artificial crystal