Cutting diameters: 1/4", 3/8", 1/2", 5/8" and 3/4". The 1/4" bit has a solid carbide insert blade. 1/4" shanks. Route dados and straight cuts for joinery 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, Weight: 0.63 pounds, Manufacturer: Yonico