NOTE!! INSTRUCTIONS FOR USE OF THIS DOOR STOPPERThe opening and closing of the gate is controlled by the button at the center of the base.Maybe the initial state of the gate is open or closed, please press the control button with your finger to switch to the state you need Height adjustableYou can adjust the height of the door stop by turning the screw to fit a door gap of 5 to 25 mm (0.2 inch to 1 inch). If your door seam exceeds this range, please rest assured, you can also buy our heightened base, which can meet the requirements of 5-35 mm (0.2 inch to 1.38 inch) No need to drill 2 installation methods-use 3M stickers without drilling , no holes. This will not damage the wooden floor, marble floor, tile floor in your home .And also use screws for permanent installation. Application scenarios wherever you want to keep the door open, please use a windproof door stop, such as mesh doors, residences, dormitories, offices, hotels, recreational vehicles, cabinets, terraces, campers, etc.If you have any issue, please feel free to contact us. Product parameter TypeZinc Alloy Door Stop Surface treatmentmatt black satin Main materialzinc alloy Scope of applicationwidely used What's in the box Matte black base Matte black stigma 3M double-sided stickers Expansion screw