The 15A Milwaukee motor offers the highest overload protection in the industry and prevents motor burn up and failure. The Constant Power Technology maintains constant speed under load for unmatched cutting performance. The patented Gear Protecting Clutch extends gear and motor life by absorbing high-impact forces caused by sudden blade lock-ups. The counter balanced mechanism makes this Sawzall the smoothest running and lowest vibrating reciprocating saw in the industry. Variable speed trigger and dial speed control offer maximum speed control. The Quik-Lok blade clamp system provides fast and easy blade changes. The saw has a 1-1/4" stroke length and no load speed of 0 to 2800 SPM. Includes case and 2 Super Sawzall blades. No. 6538-21: Amperage: 15A, Blade Stroke: 1-1/4 In., Variable Speed: Yes, SPM: 0-2800 SPM, Tool Weight: 9.8 Lb., Dimensions: 18-3/4 In. L, Cord Length: 8 Ft., Pkg Qty: 1, Package Type: Box