Carbide Bur Cylindrical Ball Nose Shank Size 1/4 In. Cutting Edge Type Double Cut Overall Length 2 1/2 In. Length of Cut 3/4 In. Cutter Dia 5/16 In. Max RPM 25000 To 28000 Shank Material Carbide Trade Number SC-2 Application For Steel Stainless Steel High-Temp Alloys And Cast Iron