SECURITY AND PRIVACY - This portable door lock provides you with extra security and privacy, greatly improving your security and preventing unauthorized entry, so the door can't be opened from the outside, not even with a key. EASY TO USE and CARRY- Easy to install or remove, this door lock can be installed in seconds without any tools, even in emergency situations and in the dark. Just insert the metal piece into the slot of the door lock, close the door, and then put the red handle groove to the stud on the metal sheet, then no one can open the door from outside. MATERIAL - The door security device is made of strong stainless steel. Rugged ABS plastic cover to prevent damage to doors under pressure. WIDELY USED - The security door stopper contains two holes of different sizes to ensure that all types of door locks are matched. Perfect for hotels, dormitories, apartments, short-term rentals, Airbnbs, bathrooms, bedrooms, or private rooms.