Raised panel bits with back cutter to produce panels from 3/4 in stock that are flush with the door frame for a professional look. Finished doors can be sanded with a wide belt sander or drum sander for easiest finishing. Shims are included to allow adjustments of the tongue thickness from 7/32 to 1/4 in. Cuts all composition materials, plywood, hardwood and soft wood. Use on table mounted portable routers.