The 15 A super Sawzall® reciprocating saw is the fastest, most durable reciprocating saw in the world. It is the first Sawzall® reciprocating saw to include Constant Power Technology™ which maintains constant speed and power under load for unmatched cutting performance. The 15 A 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.