The Diablo 1/2 in. x 1 in. Carbide Top Bearing Flush Trim Router Bit has an upper bearing that travels along the edge of a template to guide your tool down an identical cutting path. Ideal for making copies of a master workpiece, it provides a controlled, splinter-free trim on all types of wood and laminates. The high-density carbide and titanium composition stands up to repeated use and is designed to produce clean, safe cuts every time.