Brazed diamond cup wheel Grit: #30, #40, #50, #60,#80,#100 Size: 4",4. ... , #60,#80,#100Size: 4",4.5",5"This cup wheel is used for grinding the surface of various granite, marble, concrete, etc ... -advanced technology of diamond brazing, the surface of grinding cup wheel will be free grinding, the grinding effect will be better ...