... 1)Metal bond 4'' floor grinding diamond tool 2)Segment thickness:12mm 3)Grit 30,50,80,150,300 4)Higher diamond ratio ... 4" unique quality metal bond floor grinding diamond tool ----- We supply ... designed2. Use wet and dry3. Grit no. covers 30,50,80,150,300, or customized4. 4" or customized sizes5. The ... tools in this serie: JS-010 floor grinding diamond tool