SECURITY AND PRIVACYThe security lock is equipped with a carry pocket bag, you can put it in your pocket or handbag, can be used when staying in a hotel or any other short term rental. When you fall asleep, someone outside the door cannot open the door with the key, which greatly improves your security. EASY TO USEThe security door locks laptops can be quickly installed and removed without any tools or drilling, a must-have safety assistant for travel. The first step is to open the door and insert the metal piece into the door lock slot the second step is to close the door, then put the red handle groove on the metal part stud, the installation is complete. WIDELY USEDPerfect for motels, hotels, resorts, dorms, apartment security, short term rentals, bathrooms, bedrooms, etc. It can also be applied to prevent animals from going out and to prevent children from opening their foreign doors. Door lock security is the second protection, you should also lock your door, instead of relying on it. Portable door locks They are suitable for doors that have hinges and s open inward, there must be a proper door seal (door seal 3mm), upgraded door locks have two different sizes of door holes: 0.87 x 0.78 door hole thumb 1.18 x 0.78 inch door hole: (please measure your own door size) Not suitable for sliding doors, double doors, slatted doors and swing doors. PERSONAL CUSTOMER SERVICE In your suitcase there must be a portable door lock to give you an extra sense of security during the trip. Of course, you can also give it to your friends and family to ensure their safety and care. Tips: If you have any questions, please feel free to contact us by email immediately.