FEATURES HIGH QUALITY MATERIALS: Our sliding door locks are made of eco-friendly, sturdy ABS plastic and strong 3M adhesive tape, which can be securely fastened to a wide variety of sliding door and window flats, such as glass, wood, plastic and metal. No tools or drilling is required. AIRPLANE WING DESIGN: Our sliding door lock restricts and stops the opening of the sliding door based on an ingenious design. The switch is hidden, easy to open for adults but hard to open for children and pets. EASY TO USE: Quickly peel off the 3M tape on the back of the lock and press on a clean, dry surface for up to a minute. Simply pull the wings on either side of the latch and flatten them to lock and unlock. No key is required. IDEAL FOR: These sliding door locks can be installed on sliding doors, sliding windows, decks, closets, showers, windows, closets and more. It restricts and stops the opening of sliding doors or windows, preventing your children/pets from being in danger and keeping them safely inside. Product name: sliding door and window lock Product Material: abs Product Size: 7.5*9cm Color: white Packing list (available after purchasing one product) Door and window lock x10 Please understand: 1.Due to the long shipping time, the item may be damaged during transportation. If the item is damaged, please leave us a message through the official website immediately and then post a comment, I will solve the problem for you. 2. Due to manual measurement, the size may have 1-3cm error. 3. The color may vary from monitor to monitor.