The original Worm Drive, lighter and better than ever. At 3 lbs. lighter than the previous incarnation, this saw is built with rugged magnesium. Unstoppable durability meets lightweight ease for long days and a motor that stays cooler for years of heavy use. On top of our legendary Worm Drive, you get the best-in-class Dual-Field™ motor, engineered specifically by SKILSAW for saws. Just bolt on the included Diablo blade, and even the toughest jobs don't stand a chance.