Portable door lock, can be installed in seconds without the use of tools. This user guide provides extra security and privacy. When you are sleeping and resting, the portable door lock cannot be easily opened even if someone else outside the room has the key. Iron sheet 5.12*1.6*0.47 inches, average chain length 4.7 inches, black 2.16*0.39 inches. Provides you with higher security and privacy. Can be used at home, or carried with you when traveling, living in apartments, hotels, students in school blocks, and is also an ideal choice if you live in AirBNB or other short-term rentals. The security lock comes with a carrying bag. Perfect for room rentals, travel and vacations. They are all handmade, and some flaws are normal. Does not affect normal use. Be careful when installing the door lock, otherwise it is easy to bend and break. And the door lock is the second line of defense, you should also lock the door, not rely on it. Tips. The gap between doors must be greater than 3 mm. This ensures your safety indoors, no matter where you are, at home or elsewhere.