Kowood Pro Tongue And Groove Set Of 2 Pcs. With A 1/4-Inch Shank Router Bit Set KOWOOD PRO Tongue and Groove router bit set is an upgraded new product. Which is specifically designed for the high quality demanded by woodworking industrial application KOWOOD PRO C3 carbide with a new process of heat treatment shank support this set of bit in heavy-duty and maximum durability Precisely machined carbide for clean and accurate trimming, grooving for all types of wood material. With adjustable washer to adjust the spacer quantities as necessary to achieve the desired fit Wide use application and suitable for woods, laminate, particle board, plywood compact panel. Universal 1/4? Shank suitable for all major benchtop router table such as KOWOOD, Bosch, DeWalt, Makita, Milwaukee, Porter Cable, Skil, Ryobi, Black Decker. (benchtop router table use only)