Carbide Bur Cylindrical Flat End Shank Size 1/4 In. Cutting Edge Type Double Cut Overall Length 2 3/4 In. Length of Cut 1 In. Cutter Dia 3/4 In. Max RPM 5000 To 9000 Shank Material Hardened Steel Trade Number SA-7 Application For Steel Stainless Steel High-Temp Alloys And Cast Iron