This product serves two purposes: "preventing door knob operation" and "creating a gap in the door." You want your cat to have as much freedom as possible in the house, but in places like the bathroom, where accidents can happen, or in bedrooms where you don't want them to go, the Noblock easily secures the doorknob to prevent your cat from entering. By changing the direction of the Noblock, you can also prevent the door from closing completely. When you want your cat to be able to move freely between rooms, use the Noblock to create a gap to prevent the door from closing unexpectedly due to wind or other factors. This prevents accidents like trapping a tail in the door or accidentally locking your cat in a room. #sakura #yukinko10shop