Abrasive Round brush 1. For grinding stone and slab surface 2.Female ... /8"-11, M14, M16 3.Type: Silicon carbide brush Abrasive Round brush1.Applying to grind stone and slab face2.Grit: 36 ... #,46#,60#,80#,120#,180#,240#,320#,500#,800#.3.Back: common one or snail lock 4. Female thread:: 5/8 ...