CMT 800.523.11 7 Piece Crown Molding Set, 1/2-Inch Make crown molding that surpasses anything youll find at the lumberyard. The set consists of a 7-inch diameter, 5/8-inch arbor cove cutter, six 1/2-inch shank router bits. Bits with inverted design, so your workpiece remains in contact with your router table for accuracy and control. For cutting plywood, hardwood/softwood on router tables only. Not for use on hand-held routers. CMT bits were rated the best overall in comparison to other brands (Test by Wood Magazine).