Vermont American 23120 1/2-Inch by 90-Degree Carbide Tipped V-Groove Router Bit, 2-Flute 1/4-Inch Shank Razor sharp cutting edge diamond honed for smooth cuts Triple tempered shank for maximum durability Industrial micrograin carbide for smooth cut For door front grooving, lettering and sign work Shear angle cutter geometry for efficient cutting