Make sure you family doesn't get trapped in case of a fire. Store an escape ladder in every upper floor room.an easy-to-use rung release system that is always tangle free to provide your family with an instant escape route in a matter of seconds! Easy to use: Attaches quickly to most common window sills (Maximum window sill width: 11 inches), Lightweight & Compact, Ready for use: No tools or assembly required, Ladder tested to 1000 lbs.