CMT 800.526.11 3-Piece Tongue & Groove Cabinetmaking Set in Hardwood Case, 1/2-Inch Shank Contains two 1-3/4-inch tongue and groove bits and a 1/2-inch flush trim bit 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)