1. Material is high quality diamond powder, metal bond
2.Diameter is 3 inch, hole size is 5/8-11
3. Bond can be super hard, very hard, hard, medium, soft, very soft, super soft
4.Grit can be #16,#30,#50,#80, also accept customized
5.Application is for concrete, marble,granite, limestone, quartz and other floor material grinding