The 6509-31 Sawzall® Recip Saw delivers best in class cut speed, durability and power with a 12 Amp motor providing 0-3,000 strokes per minute, and a 3/4” stroke length. The gear protecting clutch absorbs 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.