1)Metal bond 4'' floor grinding diamond tool 2)Segment thickness:12mm 3)Grit 30,50,80,150,300 4)Higher diamond ratio ... market because they bring highest efficiency and save labor cost at the extreme,thanks to the premium raw materials they have ... designed2. Use wet and dry3. Grit no. covers 30,50,80,150,300, or customized4. 4" or customized sizes5. The exclusive ...