Amana Tool 57232 Carbide Tipped Cove and Backsplash with Ultra-Glide Radius Bearing Solid Surface 1-1/8 D x 1/2 CH x 3/8 R x 1/2 Inch SHK Router Bit Carbide Tipped 1/2 Inch Shank SPECIFICATIONS: Diameter (D): 1-1/8 Radius (R): 3/8 Cutting Height (B): 1/2 Shank (d): 1/2 Overall Length (L): 2-7/8 Replacement Collar: 47740 Replacement Bearing: 47737 Flutes: 2