The 6519-31 SAWZALL recipe saw delivers best in class cut speed, durability and power with 0-3,000 strokes per minute, a 1-1/8 in. 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.