Product information: Name: Aluminum alloy anti-theft door buckle Material: aluminum alloy Surface: electroplating, wire drawing process Accessories: Mounting screws Applicable: all kinds of home doors Features: Electroplating process aluminum alloy One piece Easy to install Anti-corrosion and anti-rust Adults open in seconds Anti-collision rubber strip: Quiet opening and closing, effectively protecting the door from collision marks Protect the beauty of home decoration and make it more durable Featured Aluminum Alloys: Selected aluminum alloy, Surface plating Waterproof and rustproof, longer service life Flexible opening and closing material: Made of selected aluminum alloy, thickened Anti-collision is not easy to be deformed, and the opening and closing is smooth Instructions: (when use glue) 1. Preset installation location, you can mark it with a pen 2. Apply nail-free glue evenly in strips on the base of the sub-button 3. Squeeze and stick the sub-buttons, and paste the auxiliary stickers to prevent them from falling 4. Repeatedly adjust the position until the buckle can be closed freely 5. Apply glue in the same way (do not apply screws) 6. Wait 72 hours after sticking, (longer in winter) Packing list: Door lock x1pc Screws