Dremel accessory (570) wall and floor grout removal bit is designed for cleaning wall and floor grout or removing grout to replace broken tiles The grout removal bit is ideal to use on aerated concrete, drywall, plasterboard, grout Recommended to use with the Dremel grout removal attachment (568) for precise guided grout removal and optimal results Working length: 10 mm; working diameter: 3.2 mm; recommended RPM: 20.000 rpm Fits with all Dremel Multi-/Rotary tools or other 3,2mm shank size multi- / rotary tools, Weight: 0.0220462262 pounds, Manufacturer: Dremel