Slipstick Stop N Glow doorstops feature a treaded design which provides a non-slip grip to stop doors on all hard surface floors, carpets, and rugs. These premium door wedges fit in small to large under door gaps for universal use in a range of settings. For high door gaps place the long side up and for short door gaps place the long side down. Includes set of 2 non slip door stop wedges and 2 bonus door stop holders with adhesive backings that can be stuck on the door or wall for convenient storage of doorstops when not in use. Features heavy duty construction, premium materials, and specially designed to securely stop all types of doors in households, businesses, offices, schools, and industrial settings. Glows in the dark so you can see where your door is when the lights are off. Covered by Slipstick's 5-year free replacement warranty.