Cuts away from both the top and bottom edges (towards the center) of the board simultaneously giving a superior finish on both edges. Engineered for faster feed rates and long cutting life. New super micrograin carbide formula offers extremely sharp and longer lasting cutting edges. Low helical grind shears material with more efficient chip ejection. The tool works less runs cooler and out performs the competition. Premium quality super-micrograin carbide. 2 compression spiral cutting edge (Z2+2). Cut Diameter: 1/2 . Cut Length / Outside Diameter: 1-1/8 . Cut-Radius / Angle / Depth: 3 . Shank Diameter: 1/2 .- SKU: HDSRBR4101