Carbide Bur, Cylindrical Ball Nose Shape, Cutter Dia 1/8 In, Shank Size 1/8 In, Overall Length 1 1/2 In, Length of Cut 9/16 In, Double Cut, Max RPM 90, 000, Solid Carbide Shank Material, Trade Number SC-42, For Steel, Stainless Steel, High-Temp Alloys And Cast Iron RestrictionsCalifornia Proposition 65 Warning: This product contains a chemical known to the State of California to cause cancer. Carbide Burs and SetsMachine-ground, tool-built to exacting tolerances of concentricity, size, and shape.Double CutRight- and left-hand helical flutes combine to produce a chisel-type cutting edge for faster penetration and stock removal. Creates a smooth finish on a wide variety of materials.