Our Walkabout door lock is an essential if you're planning on staying in budget lodgings, and recommended no matter where you stay. Extremely simple to use, it installs on a door in seconds. A quick-release feature allows for fast emergency exit. Stops anyone from entering your room, from mysterious strangers to unwanted maids at hostels. Small and lightweight: 1.7 ounces, 1 x 5 inches. Inexpensive, too.