Dremel Trio TR780 5pc Specialty Carbide Router Bit Set. Ideal for routing rabbets, grooves, dovetails, and rounded corners. Includes: TR627 1/8 inch Carbide Roman Ogee Bit; TR631 1/8 inch Carbide Corner Rounding Bit; TR624 1/2" Carbide V-Groove Bit; TR629 3/8" Carbide Dovetail Bit; and TR628 1/4 inch Carbide Rabbet Bit. For use with the Dremel Trio Tool, which is not included. 3/16 inch shank.