Hands-free & Easy to Use: It usually takes at least two people to install the door. But this door installation kit can help you move your door with a one-person freehand installation. At the same time, the tool kit does not require any accessories and can be used directly. The door lift has four 360-degree rotating wheels with brakes, which makes it easier for you to move and stop during installation. Suitable for 1" to 2-3/8" Doors: Door mounting kit is designed for different doors from 1" to 2-3/8" thickness. You can adjust the appropriate thickness through the knob to install the door. This tool is designed with a large anti-slip pad area, which can effectively protect the door from damage. Anti-slip mats are also used on the part near the door to increase the stress-bearing area and improve efficiency. Premium Door Installation Kit: The door panel lifters use heavy-duty steel as material, stable and strong enough to withstand impacts and bends. At the same time, its surface is treated with black paint coating, which not only makes it have good corrosion resistance and rust resistance, but also has a beautiful appearance and rich texture. This frosted treatment greatly extends its service life. Sturdy & Durable Design: The four corners of the door dolly are designed with triangular reinforcement, making it difficult to deform and increasing its load-bearing capacity. After many tests, each installation tool can withstand 500lbs (1000lbs in total). In addition, adopting high-quality welding technology, its edges and corners will not scratch the skin when people use it. Multiple Applications: This door installation kit avoids scratches caused by leaning the door against the wall or floor, so it can effectively protect the doors from damage, perfect for 1 inches to 2-3/8 inches in thickness, such as pocket doors, French doors, bi-fold doors, steel frame doors or barn doors, and so on.