Carbide Bur Cylindrical Flat End Shank Size 1/4 In. Cutting Edge Type Single Cut Overall Length 2 1/2 In. Length of Cut 3/4 In. Cutter Dia 3/8 In. Max RPM 20000 To 23000 Shank Material Hardened Steel Trade Number SA-3 Application For General Purpose Use On Steel Cast Iron Ferrous And Non-Ferrous Materials