Rr international provides mop wheels that are smaller version of flap wheels. These mop wheels have a shank of 6 mm and can be easily held on a flexible hand grinder. They are used for deburring, cleaning and polishing of small diameter tubing, concave surface, channels and recessed areas on a variety of surfaces. The mop wheels come in diameter size of 25, 30, 40, 45, 50, 60, 75 and 80 mm; and in width of 20, 25, 30, 40 and 50 mm. Grit is from 60 to 400. Some of the applications of this mop wheel includes internal polishing of cylindrical surfaces; finishing of dies, light welds; light deburring; and polishing curved surfaces.