Ball Bur SD Cut Type Double Shank Dia 3 mm Head Dia 4 49/64 mm Head Length 4 49/64 mm Included Angle Not Applicable Overall Length 38.10mm Trade Number SD-53 Primary Material Application Brass Bronze Carbon Steel Cast Iron Copper Stainless Steel Titanium Head Shape Ball Operating Speed - Maximum 80 000 RPM Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Carbide