Undercutting can be a pain, but here's the tool that gets the job done faster and easier than any other. The Crain Super Saw Kit Features a 13-amp motor and a 6 1/2-inch diameter flush-cutting blade for tackling the thickest doors and most awkward angles. Designed to undercut even those hard-to-reach inside door corners, the Super Saw cuts through 1-3/4-inch thick doors without taking them off their hinges. A blade height adjustment from flush 1-1/4-inch off the floor enables a variety of gapping sizes. A retractable stabilizer keeps the saw operating smoothly under load.