Used by mechanics, machinists, tradesman, and hobbyists. They are used in electric, pneumatic, and hydraulic die grinder. These burrs are essentially electric files which can grind in tight spaces with precision focus. Aluminum cut SC-3L6 Cylinder Ball Nose Head Shape Aluminum cut SC-3L6 Cylinder Ball Nose Head Shape , 1/4 (6., 35mm) shank and 3/8 (9., 52mm) head diameter; 6 shank length, 7 total length. Double Cut Burr File, 10mm Ball Head Carbide Burr File 54mm Long Shank TEMO SC-3L6 Burr TEMO SC-3L6 Double Cut Carbide Rotary Burr File, 3/8 Inch (9.5 Mm) Head Cylin Carbide Burr File These burrs are essentially electric files which can grind in tight spaces with precision focus. TEMO SC-3L6 NF Aluminum Cut Carbide Burr File, 3/8 inch (9.5mm) HEAD Cylinder Ball, 1/4 inch (6.35mm) Diameter 6 inch (152mm) Long Shank They are used in electric, pneumatic, and hydraulic die grinder. Aluminum cut burrs are for use on non-ferrous and non-metallic materials.