TEMO SF-5L6 Double Cut CARBIDE ROTARY BURR FILE, 1/2 inch (12.7mm) Head Round Tree, 1/4 inch (6.35mm) Diameter 6 inch (152mm) Long Shank double cut SF-5L6 Cylinder Ball Nose Head Shape 1/4" (6.35mm) shank and 1/2" (12.7mm) head diameter Burrs are made with tungsten carbide and are suitable for deburring and polishing cast iron, cast steel, carbon steel, alloy steel, stainless steel and other materials up to HRC65 hardness. Packaged in a clear plastic tube 6" shank length, 7" total length.