Amana Tool 55395 2-Piece Carbide Tipped Lock Miter 22.5 Deg x 1-15/32 D x 7/8 CH x 1/2 Inch SHK Router Bit Set
Intended primarily for corner cabinetry, this two-bit set produces a 45? assembly. One bit that bevels & grooves the workpiece, the second bevels and forms a tiny tongue on the mating edge. The set can be used in assembling any octagonal structure, from boxes and planters up to posts.
Works on stock thicknesses minimum 3/8" to maximum 3/4". For best results use the bits in a table-mounted router, and adjust each to the same evolution. That is, measure from the tabletop to the bit top when you make the cuts with the first bit, then set the second bit to the same height.