Atoplee 5pcs Dia 75mm Gray Fiber Grinding Wheel Rotary Tool for Metal Ceramics Marble Wood Polishing Diameter: 75mm(3inchs); Aperture: 11mm Product Material: Fiber Suitable for metal and stainless steel products. For the polishing/grinding of metals, ceramics, marble, polished wood crafts, etc. Good sand grain effect, anti-high temperature, good wear resistance.