CMT 800.606.11 Professional Finger Joint Bit, 1/2-Inch Shank, 1-7/8-Inch Diameter, Carbide-Tipped 7/32-Inch Cutting Depth To be used on boards from 1/2 to 1-3/8-Inch thick 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)