Dremel Trio TR770 5pc Starter Carbide Router Bit Set. Ideal for routing chamfers, decorative edges and rounded corners. Includes: TR621 3/16” Carbide Beading Bit; TR623 1/4 inch Carbide Cove Bit; TR620 1/4 inch Carbide Flush Trim Bit; TR632 1/4 inch Carbide Chamfer Bit; and TR622 1/4 inch Carbide Round Nose Bit. For use with the Dremel Trio Tool, which is not included. 3/16 inch shank.