How often do you set-up shooting rests at the range, only to find that your rifle isn't at the proper height. or the seat is too high for the bench? Lyman's Bag Jack is designed to make it easy to adjust the elevation of your rifle and bring it into line with your target, while also allowing you to maintain a comfortable shooting position. Compact, stable, and infinitely adjustable, the Bag Jack is the perfect platform to set up your shooting rest at the range. Create the optimal shooting position under any shooting conditions. The Bag Jack corrects the height with a simple turn of the adjustment knob. The lift is made from sturdy aluminum and steel components and has a non-slip textured platform. The lift is 10" x 10" so it can accommodate the largest size rests, and collapses for unmatched portability..