ITEM NAME:100mm Diamond Grinding Wheel Disc Concrete Masonry Granite Stone Tool This Diamond Wheel generally applicable to the grinding of marble, granite, ceramic, artificial stone and glass, etc. especially suitable for the building decorated with concrete wall, marble floor, grinding edge of granite plate, chamfering and arc grinding. &;nbsp; Features: High speed of grinding, long service life. Fits all 100mm sander/polishers. Used on high-speed electric grinder and pneumatic tools. 100% brand new and high quality. &;nbsp; Specifications: Material: diamond alloy Size(diameter): 4 inch/100mm Inner hole diameter: 20mm (without metal ring) Inner hole diameter: 16mm (with metal ring) Thickness of diamond segment: 6mm Hardness: 80 Max speed: 3600r/min Max line speed: 1200rmp Color: yellow &;nbsp; Package includes: 1 x Diamond Wheel.This Diamond Wheel generally applicable to the grinding of marble, granite, ceramic, artificial stone and glass, etc. especially suitable for the building decorated with concrete wall, marble floor, grinding edge of granite plate, chamfering and arc grinding.