Was under my truck installing class 4 hitch. Drilling holes overhead in frame for 1/2 bolts. Arms and shoulders were just killing me, when I thought of a better way. (No, not paying somebody else to do it.) Put a 4x4 on the ground as a fulcrum, long 1x2 as a lever under the drill. Pulled trigger and balanced with left hand, pushed down on the lever with the right, and in a matter of seconds had the upward force needed to drill through the frame. Worked great, able to lift a mug of cold brew when I was done.