Carbide Bur, End Type Flat, Type Double, Shank Dia. 1/4 in, Head Dia. 1/2 in, Head Length 1/2 in, Included Angle 28 Degrees , Overall Length 2 1/4 in, Trade Number SN-4, Primary Material Application Brass, Bronze, Carbon Steel, Cast Iron, Copper, Stainless Steel, Steel, Titanium, Head Shape Inverted Cone, Operating Speed - Maximum 50,000 RPM, List Number 310N, System of Measurement Inch, Coating Bright (Uncoated), Head Material Carbide, Head Material Grade C2 Submicron, Shank Material Steel