Ball Bur SD Cut Type Double Shank Dia 3 mm Head Dia 6 11/32 mm Head Length 6 11/32 mm Included Angle Not Applicable Overall Length 44.45mm Trade Number SD-51 Primary Material Application Brass Bronze Carbon Steel Cast Iron Copper Stainless Steel Titanium Head Shape Ball Operating Speed - Maximum 70 000 RPM Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Steel