Yonico 19115 1-Inch Diameter Core Box Router Bit 1/2-Inch Shank This core box bit features a rounded tip with a 1/2" radius and a 1" cutting diameter. The cutting depth is 1-1/4" and the shank is 1/2". Route core box channels and grooves for decorative and general use Premium C3 micro-grain tungsten carbide blades for a sharper & longer lasting edge For use on CNC, table mount and handheld routers Silver induction brazing for maximum strength and durability