material and durability: The laborsaving arm jack is built from stainless steel and aluminum alloy with upgraded lifting tools, a thickened solid steel base and lifting rod, and a thickened stainless steel wave strength spring. This construction provides stronger lifting capacity, resists deformation, and offers a longer service life. loadbearing and adjustable height: The drywall elevator features a unique structure with loadbearing capacity. Height is adjustable from 0 to 14.5 cm (0 to 5.71 inches), and the simultaneous lifting object load can reach up to 880 pounds, making it suitable for a wide range of family tasks. Safe to use with controlled descent: To adjust the weight descent, press the Slow button repeatedly to finetune the descent evenly and avoid hazards from rapid descent. The Fast button enables rapid descent to the bottom when needed, enhancing safety and efficiency. Easy to use out of the box: No training or setup is required. Take it out of the box and operate with one hand. For stability, use two people on a stable and flat platform. Insert the arm into the bottom gap, repeatedly grip the handle to lift the weight to the desired height, and press the release trigger to lower the arms when work is done. Beautifully packaged, it makes a thoughtful gift for family and friends. Practical use scenarios: Ideal for drywall panel installation, enabling precise lifting to the correct height without heavy lifting. Useful for ceiling work such as installing ceiling boards or fixtures, where controlled, steady elevation is required. Also suitable for home improvement tasks like installing cabinets, heavy shelves, or other large items that need lifting and positioning at a chosen height.