Excellent Workmanship: The Labor Saving Arm is made of the hardened stainless steel and aluminum, durable with long service life. Its compression spring with high-toughness silicomanganese steel has sufficient durability and elasticity, and against rust that is very practical and strong. Extensive use: The Hand Lifting Jack Tool is widely available for lifting tiles, furniture, doors, windows, glass and refrigerators, et al. It also can prevent the objects falling and keep balance for long periods, which can effectively improve productivity and work easier. Jack specification: The Labor Saving Arm Jack can hold a weight up to 308 Lb and lift objects up to a 5.7 inch height. Its self-height is 10 inches with 1.6 Lb weight. Innovative Design: The Jack Tool is designed to be handheld and easily to use. The lifting height can be adjusted freely and its precision is controllable. Easily place the gypsum board upon the load-bearing board of the Jack and grip the handle to lift it, and just press the lock tab to lower the slider while you need to lower it. It can replace varieties of traditional tools to improve productivity and save time and money. After-Sale Guarantee:Contact us freely once you suffer any problems of product use and quality, our staffs will provide you the best after-sale service and experience within 24 hours.