Champion Cutting Tool SC51 Tin Coated Miniature Bur, Cylinder Radius End Solid Carbide, 1/4-Inch Cutter Diameter 1/2-Inch Cutter Diameter Cylinder Radius End Use for surface milling and contouring 1/8-Inch Shank Used in mold and pattern making, die sinking, tool making and maintenance, burs reach into small intricate areas Burring cast iron, steels, titanium, brass, bronze, copper