Carbide Bur End Type Pointed Cut Type Single Shank Dia 1/4 in Head Dia 5/8 in Head Length 9/16 in Included Angle 60 Degrees Overall Length 2 5/16 in Trade Number SJ-6 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 310J System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Steel