Great for production settings and excellent for creating grooves and dado cuts in softwood, hardwood, plywood and composite Materials. 'Up-cut' Spiral. Three-flute design for very high quality finish, Recommended RPM 20, 000-21, 000, #46114, direction Up-cut, (D) diameter 3/8, (b) Cutting height 1-1/4, (D) shank 3/8, overall length (L) 3, flutes 3, solid carbide spiral plunge 3/8 dia x 1-1/4 x 3/8 inch Shank Up-cut, 3-flute