[Features] SUS steel material is also able to produce high cutting power without obstruction. High cutting power even in low rotation range. Sintered with WA+ polycrystalline porous granules [Specifications] Grit Size (#): 80; Outer Diameter: 1.0 inches (25 mm); Width: 1.0 inches (25 mm); Shaft Length: 1.4 inches (6 mm); Shaft Length: 1.4 inches (35 mm); Maximum Rotational Speed (rpm): 12,000; Weight: 7.2 oz (210 g); Material: Finish); Shaft Steel (+trivalent uni-chrome plating); Applications: Ideal for deburring and cutting work. For polishing molds. Tools used: Micro grinder.