Amana Tool 57139 Carbide Tipped Corner Rounding with Ultra-Glide BB Guide Solid Surface 1-1/2 D x 3/4 CH x 1/2 R x 1/2 Inch SHK Router Bit Carbide Tipped 1/2 Inch Shank SPECIFICATIONS: Diameter (D): 1-1/2 Radius (R): 1/2 Cutting Height (B): 3/4 Shank (d): 1/2 Overall Length (L): 2-3/8 Flutes: 2