1. **Our door mounting kit is adjustable in both height and width, accommodating a wide variety of door types, including French doors, pocket doors, bifold doors, steel frame doors, fire doors, barn doors, and heavyduty doors. (Note: The kit lowers the door to 11/32' and raises it to 13/8'.)** 2. **Easy Installation:** This mounting dolly is designed for effortless use, allowing one person to install the door hands. Equipped with four 360° swivel wheels with brakes, it simplifies the process of moving and positioning the door during installation. 3. **Sturdy and Reliable Design:** Our door mounting dolly features triangular reinforcements on all four corners, enhancing its structural integrity and loadbearing capacity. Each mounting tool has been rigorously tested to withstand up to 227 kg (500 lbs), with a combined capacity of 453.6 kg (1,000 lbs). The welding ensures smooth edges and corners for safe handling. 4. **OnePerson Operation:** This door mounting dolly allows effortless adjustments by a single person, making the process straightforward and efficient. The kit is ready to use immediately.