Milwaukee 15.0 Amp Super Sawzall Reciprocating Saw, 6538-21. 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. 15.0 Amp Milwaukee Motor - highest overload protection in the industry; prevents motor burn up / failure. Constant Power Technology™ - maintains constant speed under load for unmatched cutting performance. Patented Gear Protecting Clutch - extends gear and motor life by absorbing high impact forces caused by sudden blade lock-ups. Patented Counter Balanced Mechanism - smoothest running, lowest vibrating reciprocating saw in the industry. Variable Speed Trigger and Dial Speed Control - maximum speed control. Quik-Lok™ Blade Clamp System - provides fast and easy blade changes. Impact Resistant Carrying Case, 1 Super Sawzall® Blade.