Ball Bur SD Cut Type Double Shank Dia 6 mm Head Dia 9 17/32 mm Head Length 9 17/32 mm Included Angle Not Applicable Overall Length 52.80mm Trade Number SD-3 Primary Material Application Brass Bronze Carbon Steel Cast Iron Copper Stainless Steel Titanium Head Shape Ball Operating Speed - Maximum 66 000 RPM Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Steel