2 installation methods, 1: 3M tape is double-sided self-adhesive, no drilling required; 2: Spiral inserts; our installation method ensures that our door stops can be used on any surface of the wall, protecting your tile, glass, cement, wood, fiberglass, any smooth or rough surface from doorknobs, furniture or cabinets Impact. Note: 3M double-sided tape should be placed for 24 hours before use, the effect is better. Reliable installation, tape, we choose 3M, super glue; screw, compared with others, we add a screw, the triangular support is more stable, the two installation methods have a long service life, the lifting weight can reach 10 pounds, and it will never fall off, Always protect your walls. Can be mounted on the wall, keeping the door open, or mounted on the door without damaging the wall 3 inches tall and made of stainless steel, it won't rust and ensure durability and reliability. Works great, feels great in hand, looks great and is perfect for home use. Updated Details - Child Safe, our bumper rubber tips are difficult to remove, we screw on the tips to reduce the risk of the tips becoming a choking hazard. The rubber tip protects your door, provides significant cushioning between the doorknob or handle and the wall, and also reduces noise, which is a must in any high-traffic area like a school or office. Wide applicability: Our door stops can be installed in bedrooms, bathrooms, living rooms, business offices, schools, and are suitable for all surfaces of walls, even glass. Please enjoy this completely risk-free purchase.