CMT 800.527.11 3-Piece Entry & Interior Door Router Bit Set in Hardwood Case, 1/2-Inch Shank Contains a 3-inch tenon cutting bit and a 1-7/8-inch rail and stile router bit set Anti-kickback design, Non-Stick Orange Shield Coating 2 SinterHip Hi-Density Industrial Chrome Carbide cutting edges for long-lasting performance 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 brand (Test by Wood Magazine)