The GST18V-47 18V Barrel Handle Jigsaw features widened front areas with a soft grip and a small cylindrical handle circumference for better control of the tool. It provides variable speed control - from 550 to 2700 strokes per minute - to match the speed to the material. The jigsaw stroke length is about 1 inch, which allows you to cut up to 4 7 inches on wood and up to 0 8 inches on aluminum. It has four orbital action settings to control cutting and an auto-stop to stop the travel mechanism. The tool is equipped with a tool-free blade changing system with a T-shank.