This manual jack is constructed from 45# solid steel, featuring a thickened and widened base for reliable load-bearing. Its inclined port design allows easy insertion under objects. With a lifting capacity of 330LBS for every 2 pieces, it offers a lift range from 0 to 6.7 in. and stands at 12 in. tall. Built with an innovative design, it comes with a comfortable, labor-saving handle, thickened high-strength springs, and solid guide rails. The handheld tool is lightweight yet capable of handling heavy loads, helping installers work efficiently and reduce fatigue. It’s a multifunctional tool ideal for installing doors, windows, cabinets, decks, and frames, plus floor jacks, drywall elevators, and wall tile height adjustment. Adjustment is easy: place it under the cabinet, press the handle to raise slowly, and hold the handle while pressing the pressure plate to lower to the right height. It can replace various traditional tools, helping improve productivity and save time and money.