Bosch 84623M 1/4-Inch Shank Tongue & Groove Router Bit 3-Wing With Bearing Designed to cut tongue and grooves on 1/2 In. through 3/4 In. thick material Full assembly used to cut the tongue; removing one slot cutter will cut the groove Micrograin carbide tips provide superior wear resistance and long life Recommended for use with a router table Replacement cutter is 85610M