Do you have a hinged door in your home or office, classroom or shop - that needs to remain open? If so, now you can spare yourself the work, the mess, and the expense of having to drill holes into your finished walls, baseboards and floors. Holding a door open with a single simple device like these portable holders could not get any easier. They feature a practical and easy-to-slide-under method of installation and require no tools or fasteners. To use these stops on a hinged door, simply arch the metal strap downward and slide it under the door's edge. These door holders work best when the arch creates tension between the rubber feet of the holder and floor beneath it. No tools or fasteners are necessary. Order yours today.