The Skil SHD77M is a 7-1/4 inch Magnesium Worm Drive Saw. It delivers 15 Amps of power, cutting through more material in less time. The upgraded motor contains new high-temperature wiring to handle the increased power. The new worm drive offers a 24-tooth carbide blade to perform the most rigorous cuts. A two position saw hook ensures safe rafter placement. The patented Anti-Snag lower guard provides smooth operation for small cut-off pieces.