The 6509-31 Sawzall reciprocating saw delivers best-in-class cut speed, durability, and power with 0-3,000 strokes per minute, a 3/4-Inch stroke length, and a 12-amp motor. The gear protecting clutch extends gear and motor life by absorbing high impact forces and a Quik-Lok blade clamp offers fast tool-free blade changes. To provide greater user comfort, a counter weighted mechanism reduces vibration for smoother operation and a redesigned front grip area provides best in class ergonomics.