This dollie easily lifts heavy doors and windows, plywood, drywall, paneling, plate glass, and more. Simply roll dollie to your product, tilt forward to raise rear casters and lower lifting plates. Then roll underneath door or window. Pull door or window back against dollie, and tilt dollie back on all four casters. Very simple with no heavy lifting. The Warehouse Dollie is equipped with heavy duty casters for easy rolling. Padding is provided for product protection. An optional 24” x 32” plywood sheet (not included) can be placed on the base for accessories, no fasteners needed. Base and casters come pre-assembled. The frame is adjustable for handling different types of material. This dollie features one caster with directional lock and one caster with brake.