Carbide Bur End Type Radius Cut Type Double Shank Dia 1/4 in Head Dia 1/2 in Head Length 1 1/8 in Included Angle 14 Degrees Overall Length 2 7/8 in Trade Number SL-4 Primary Material Application Brass Bronze Carbon Steel Cast Iron Copper Stainless Steel Steel Titanium Head Shape Cone Operating Speed - Maximum 50 000 RPM List Number 310L System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Steel