These tools have a much shorter Up-cut section than the standard compression tools. They are ideal for Mortising, grooving and dado. The 3 flute design provides an extra-smooth finish, #46022, (D) diameter 1/2, (b) Cutting height 1, (D) shank 1/2, overall length (L) 3, B1 1/4, flutes 3, CNC solid carbide mortise compression spiral 3 flute 1/2 dia x 1 cut height x 1/2 inch shank