Made of high-quality rubber material, this door stop will not damage the floor or leave any marks. It provides a firm grip and will not harm the door. Safe and reliable to use. If the rubber door stop becomes dirty, simply clean and wipe it for better performance. Fits various door openings: suitable for most door gaps without cracking during daily use. The size of the door stop is 12.3 cm x 4.1 cm x 2.5 cm. It works well for gaps between 0.5 inches and 0.8 inches on the floor. If the door gap exceeds 2.00 cm, two door stops can be stacked together for stronger holding power. These stops feature a sloped design to prevent doors from closing automatically. Wide range of applications: the door stop works effectively on various high-friction surfaces such as wood, cement, vinyl, ceramic tiles, carpets, and more. The thicker the flooring surface, the better the grip. Easy to use: simply place the door stop at the bottom of the door. No drilling or adhesive tape required. Leaves no sticky residue or unsightly marks. These rubber door stops allow you to move freely within your home, school, or office without constantly opening and closing the door. Ideal for multiple rooms in homes or offices, including classrooms or office doors. Includes free mounting hook: each door stop comes with a free support hook that allows you to hang the product on any door (or wall), keeping it secure and organized to avoid losing the rubber door stop.