Champion SF42 Titanium Nitrite Coated Burs Solid Carbide Miniature 1/8-Inch Cutter Diameter 1/2-Inch Length of Cut Tree Shape Radius End 1/8" Cutter Diameter 1/2" Length of Cut Used in mold and pattern making, die sinking, tool making and maintenance, burs reach into small intricate areas Cast Iron, steels, titanium, brass, bronze, copper