The original worm drive SKILSAW®, often called the saw that built America, just got better. At 1 lb lighter than its predecessor, SKIL's 7-1/4 in. Aluminum Worm Drive Circular Saw with Carbide Blade combines the power and durability you expect from SKILSAW® with jobsite-proven, pro-focused features. On top of the legendary worm drive, you get the best-in-class Dual-Field™ motor, engineered specifically by SKILSAW® for saws. You've got your hands on the next evolution of the saw famous for cutting truer and lasting longer.