Amana Tool 49412 Carbide Tipped Chamfer 30 Degree x 1-3/8 D x 13/16 CH x 1/4 Inch SHK w/Lower Ball Bearing Router Bit Carbide Tipped 1/4 Inch Shank SPECIFICATIONS: Diameter (D): 1/2 Angle (a): 22.5 Cutting Height (B): 1/2 Shank (d): 1/4 Overall Length (L): 1-7/8 Flutes: 2 D1: 3/16