Amana Tool 55438 Carbide Tipped InStile & Rail Mission Style/Straight 1-5/8 D x 5/8 to 1-1/8 CH x 1/2 Inch SHK w/Lower BB Adjustable Router Bit Set for Plywood Carbide Tipped 1/2 Inch Shank SPECIFICATIONS: Diameter (D): 1-5/8 Cutting Height (B): 5/8 to 1-1/8 Shank (d): 1/2 Overall Length (L): 3-11/32 Type: Mission (Straight) Flutes: 2 C: 3/8 B1: for 1/4" Plywood 3/16 to 9/32 B1: for 1/2" Plywood 7/16 to 17/32