Powerful 12-amp motor delivers 0-3,000 SPM for high performance cutting in a variety of materials 1-1/8-inch stroke length provides maximum cutting speed Gear protecting clutch extends gear and motor life by absorbing high-impact forces caused by blade lock-ups Counter-weighted mechanism provides reduced vibration for smoother operation QUIK-LOK blade clamp provides fast, tool-free blade changes The 6519-31 Sawzall Recip Saw delivers best in class cut speed, durability and power with 0-3,000 strokes per minute, a 1-1/8-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. Note that product package does not include blade. Blades are sold separately.