Amana Tool 55430 2 PIECE OGEE STILE & RAIL ROUTER BIT SETThese types of sets utilizes two different cutters that are 'coped' to each other. Also included are extra cutters for trimming and rabbeting and spacers if you decide to use the bearings similar to a 'reversible' set. With trim cutters #55448 & #55450 - use on 7/8" through 1" stock use. For 5/8" through 7/8" stock, substitute trim cutters with spacers.