Applications: Suitable for any project requiring precise tongue and groove joints with perfectly finished surfaces. The set includes one tongue and one grooving bit.Machines: Table routers.Materials: Softwood, hardwood, plywood and wood based panels.Bit Material - TiCo Carbide A specially formulated, highly compact Titanium Cobalt Carbide, engineered and manufactured by Freud. It provides a sharper edge and a flawless finish with a dramatically longer cutting life.