Ball Bur SD Cut Type Double Shank Dia 3 mm Head Dia 3 mm Head Length 2 1/2 mm Included Angle Not Applicable Overall Length 38.00mm Trade Number SD-42 Primary Material Application Brass Bronze Carbon Steel Cast Iron Copper Stainless Steel Titanium Head Shape Ball Operating Speed - Maximum 90 000 RPM Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Carbide