TEMO SC-3 Double Cut CARBIDE ROTARY BURR FILE, 3/8 inch (9.5mm) Cylinder Ball Head, 1/4 inch (6.35mm) Diameter 2 inch (50.8mm) Long Shank Double cut head. Made with tungsten carbide and suitable for deburring and polishing cast iron, cast steel, carbon steel, alloy steel, stainless steel and other materials up to HRC65 hardness. 1/4" (6.35mm) shank and 3/8" (9.52mm) head diameter 2" extra long shank Packaged in a clear plastic tube SC-3 Cylinder Ball Nose Head Shape