Amana Tool 55428 2-PC Carbide Tipped Architectural Stile & Rail 1/4 x 5/64 R x 1-15/32 D x 1 Inch CH x 1/2 SHK w/Lower BB Ease Router Bit Set Carbide Tipped SPECIFICATIONS: Diameter (D): 1-15/32 Radius (R): 1/4 Cutting Height (B): 1 Shank (d): 1/2 Overall Length (L): 2-13/16 B1: 55/64 T: 7/32 Replacement Bearing: 47706 R1: 5/64 L1: 2-15/16 Flutes: 2 C: 1/2