Features: Effortlessly installion heavy door with this adjustable door installation set designs for single person operations, featuring height adjustment. Builts with industrial metal and swivels casters, this easy operations door enables three way leveling adjustments while secure transporting hanging door through narrow space. Ideal for contractors and enthusiasts handling front door replacements or interior door installations requiring stable vertical positioning without assistants. Streamlines door hanging in residential/commercial renovations by securing door height (1 3/8" lift capacity) during hinges alignment and hardware mounting procedures. The integrated board lifter cart's width adaptability (1 10/32" to 1 30/32") ensures easy transportation while reducing muscle strain during prolonged installation projects. Specifications: Materials: Metal Size: 36x20x6cm/14.17x7.87x2.36inch Package Includes: 1/2pcs Door Cart Wheel note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.