Yonico 15221 Matched Tongue and Groove Router Bit Set 1/2-Inch Shank This matching tongue and groove router bit set cuts a 1/4" thick tongue into stock up to 3/4" thick. Create tongue & groove joints for projects such as flooring, rail and stile and many more Premium C3 micro-grain tungsten carbide blades for a sharper & longer lasting edge For use on table mount router only Silver induction brazing for maximum strength and durability Includes 2 matching tongue & groove router bits with extra shims Manufactured with anti-kickback design to help prevent workshop mishaps Comes in a solid wood storage case