Safety and Privacy: Ideal for hotels or short-term rentals. When you're asleep, no one outside can use a key to open the door, significantly improving your security. Easy to Use: This portable door lock can be quickly installed and removed without tools or drilling. It's an essential safety assistant for travel. First, open the door and insert the metal piece into the door lock strike plate; second, close the door and place the red handle's slot onto the metal piece's stud. Installation is complete. Wide Application: Suitable for motels, hotels, shopping centers, resorts, dormitories, apartment security, short-term rentals, bathrooms, bedrooms, etc. It can also be used to keep pets out and prevent children from opening the door. This door lock provides a second line of defense, but you should still lock your door instead of relying solely on it. Applicable to inward-opening hinged doors with a suitable door gap (door gap ≥ 3 mm). You need a portable door lock in your suitcase for added peace of mind while traveling. Of course, you can also give it to your friends and family to ensure their safety and well-being. Delivery Quantity: 2 * safety locks