Amana Tool 45730 Carbide Tipped V Groove Signmaking & Lettering 60 Deg x 9/16 D x 7/16 CH x 1/4 Inch SHK Router Bit Carbide Tipped 1/4 Inch Shank SPECIFICATIONS: Diameter (D): 9/16 Angle (a): 60 Cutting Height (B): 7/16 Shank (d): 1/4 Overall Length (L): 2-1/4 B1: 7/16 Flutes: 3