SAIT Carbide Burr, 1/2 in Diameter Head, 1 in Length of Cut, 2-3/4 in Overall Length, Cylindrical - With End Cut Shape SB Head Shape, Double Cut Cut, 1/4 in Shank Diameter, 1-3/4 in Shank Length, Tungsten Carbide Head, 16000 rpm Maximum, Applicable Materials: Metal and Stainless Steel, Industry Specification: SB5.