The 6509-31 Sawzall Recip Saw delivers best in class cut speed durability and power with 0-3000 strokes per minute a 3/4” 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.