Carbide Bur End Type Pointed Cut Type Double Shank Dia 1/4 in Head Dia 3/8 in Head Length 5/16 in Included Angle 60 Degrees Overall Length 2 1/8 in Trade Number SJ-3 Primary Material Application Brass Bronze Carbon Steel Cast Iron Copper Stainless Steel Steel Titanium Head Shape Cone Operating Speed - Maximum 60 000 RPM List Number 310J System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Steel