Dremel Trio TR750 3pc Carbide Straight Router Bit Set. Ideal for routing, inlaying and mortising in wood and other soft materials. Use to cut grooves, dadoes, rabbets, and for general purpose material removal. Includes: TR625 1/8 inch Carbide Straight Router Bit; TR630 1/4 inch Carbide Straight Router Bit; and TR626 1/2 inch Carbide Straight Router Bit. For use with the Dremel Trio Tool, which is not included. 3/16 inch shank.