Carbide Bur End Type Cut Cut Type Double Shank Dia 1/4 in Head Dia 3/8 in Head Length 3/4 in Included Angle Not Applicable Overall Length 2 1/2 in Trade Number SB-3 Primary Material Application Brass Bronze Carbon Steel Cast Iron Copper Stainless Steel Steel Titanium Head Shape Cylinder Operating Speed - Maximum 60 000 RPM List Number 310B System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Steel