The 15.0 Amp Super Sawzall? Recip Saw is the fastest, most durable recip saw in the world. It is the first Sawzall? Recip Saw to include Constant Power Technology? which maintains constant speed and power under load for unmatched cutting performance. The 15.0 amp motor provides the industry's highest overload protection. The patented Gear Protecting Clutch extends gear and motor life by absorbing high impact forces caused by sudden blade lock-ups. The patented Counter Balance Mechanism reduces user vibration.