SECURITY AND PRIVACYThe security lock comes with a carrying bag, you can keep it in your pocket or purse, you can use it when you stay in a hotel or other rentals in the short term. you sleep, someone outside the door cannot open the door with the key, greatly increasing your security. Easy to UseThe portable security door lock can be quickly installed and removed without any tools or drilling, it is an indispensable security assistant for travel. The first step is to open the door, insert the sheet metal in door lock slot; the second step, close the door, then put the red handle slot on the metal stud, the installation is complete. Wide UsePerfect for motels, hotels, resorts, dorms, apartment security, short term rentals, bathrooms, bedrooms, etc. It can also be used to prevent animals to go out and prevent children from opening the doors. Door lock security is the second layer of protection and you should also lock your door instead of relying on it. Portable Door LockSuitable for doors with hinges that open inwards, must have a proper door seal (door seal 3mm), the upgraded door lock has two different sizes of door holes: door hole 0.87 x 0.78 inch; 1.18 x 0.78" Door Hole: (Please measure your door size) Not suitable for sliding, double, slatted and hinged doors. PERSONAL CUSTOMER SERVICE A portable door lock is essential in your luggage to give you an extra sense of security while traveling. Of course, you can also give it to your friends and family for keep them safe and take care of them.