Does anybody know if there is a 1 3/4" or 1 7/8" auger bit on the market for use in a 1/2" drill for boring 2" mortises? Milwaukee only makes them up to 1 1/2". Their 1 3/4" "self-feed" bit is more of a saw-tooth type bit, and doesn't clear chips from the bottom of a 4" mortise.