Grainger Approved Carbide Bur 19D793 Double-cut cylinder burs with a flat end and crossing left- and right-hand flutes are designed to remove stock quickly from steel, stainless steel, and other high-strength ferrous metals. They leave a smoother finish than single-cut burs. The flutes of flat-end burs stop at the top edge of the cylinder. Head Shape / Cylinder End Type / Flat Cut Type / Double Trade Number / SA-3 System of Measurement / Inch Shank Diameter / 1/4 inch Shank Length / 1-3/4 inch Head Diameter / 3/8 inch Head Length / 3/4 inch Overall Length / 2-1/2 inch Shank Material / Steel Head Material / Carbide Head Material Grade / YG7 Coating / Bright (Uncoated) Compatible Tool Type / Die Grinder; Rotary Power Tool; Straight Grinder Maximum Operating Speed / 40,000 RPM Primary Material Application / Cast Iron, Stainless Steel, Steel