The 18V Sawzall features 0 to 3200 SPM (strokes per minute), gear-protecting clutch which absorbs impact, QUIK-LOK blade clamp to provides quick blades changes, variable speed trigger to optimize speed, and on-board fuel gauge that displays remaining run time. Only 17-3/4" in length. Kit includes (2) 18V XC high capacity batteries, 1 hour charger, and case.