This set allows the woodworker to build doors from 5/8" to 1-1/4" thickness and any length. Creates extended tenons for rock-solid joints that last a lifetime. Set includes attractive wooden case, model No. 99-760 rail and stile bit set, and model No. 99-515 2+2 raised panel bit, roundover profile. Produces an extremely smooth cut in hardwoods, softwoods, and even plywoods.