2 installation methods: 1) 3M tape double-sided adhesive, no drilling needed; 2) Screw in; our installation methods ensure that our door stops can be used on all surfaces of the wall, and protect your tiles, glass, cement, wood, fiberglass, all smooth or rough surfaces from door knob, furniture or cabinets. Note: 3M double-sided adhesive tape should stand for 24 hours before use for best effect. The installation is reliable, tape, we choose 3M, strong glue; screw, compared to others, we add a screw, triangular support is more stable, both installation methods have a long service life, its hanging weight can be up to 10 lbs, never falls off, protects your wall forever. You can install it on the wall, to keep the door open, or install it on the door, then you don't need to damage the wall. Set of 2 included in your package, multiple colors can be selected, 3 inches in height, made of stainless steel, does not rust and ensures durability and reliability. Very well made, solid feel and stylish, perfect to use in the home. Updated details - Safe for children, our shock-absorbing rubber buttons are difficult to remove, we secure the buttons with the screws, reducing the risk of the buttons becoming a choking hazard. The rubber button protects your door, provides a significant damping effect between the door handle or knob and the wall, also causes less noise, really necessary in all high traffic areas such as in school or in the office. Wide range of uses: Our door stops can be installed in bedrooms, bathrooms, living rooms, offices, schools, suitable for all surfaces on your wall, even glass.