Durable and rust-proof Made of high-quality stainless steel, Door Stopper is rust-proof and durable; the surface is brushed, simple style but will not be scratched.Two methods; 3M Self-Adhesive Door Stop installation, just fluff the protective film and stick it to the wall. Drilling: You can also choose to drill the wall and screw it to make the door stopper more stable.Anti-collision and silent door stopper contains both a thick black rubber head and 3M self-adhesive sponge to cushion the force, the door is not only quiet and prevents damage to the door, wall or furniture.Wide application Door stopper available to be used in all types of doors like kitchen and bathroom doors; suitable for smooth walls: glass, wood, wallpaper, tiles, metal, etc.Dimensions: Door stop is 5.5 x 9.5 cm, to meet all your needs. Content : 4 metal door stops, 4 packs; accessories (1 pack: 3 screws and 3 bolts; extension). Product High quality wall mounted door stopper made of thick black stainless steel, simple door style rubber head; sound damping Dimensions: diameter of the base : 55 mm, total length: 95mm. Features: Stainless steel material, rust resistant; with rubber bumper, provides a cushioning effect between the wall and the door, reduces the impact force on the wall, prevents the door handle from hitting the wall and eliminates friction marks on the door. Contents: 4 door stops. 12 screws. 12 expansion bolts. Steps;installation 1. 3M Self Adhesive: Strong 3M adhesive to ensure it is stuck firmly.Step 1. Clean wall dust and oil stains Step 2. Remove the adhesive protective film along the corners to prevent dust from entering. Tips: After tearing off the film, use a hair dryer for about 1 minute to make the 3M adhesive more sticky and firmly). Step 3. Measure the location to be installed and press hard for 5-7 seconds. Step 4. Wait until the glue is completely stuck to the wall, then you can use the door stopper well. 2. Drilling: With mounting screws and wall plugs for easy installation, you can choose to install on the wall, door or plinth. Step 1. Measure the position of the door stop Step 2. Drill 3 holes on the wall with electric drill Step 3. Use a hammer to install the expansion bolts into the hole Step 4. Put the screws into the holes of the door stopper, twist and tighten the door stopper into the anchor bolts.Note: The data are all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.