These latch covers prevent the latch from catching in the door They were invaluable for my older daughter who would wake to the sound of the latch or even the slightest sound made when turning the knob They can be used to prevent waking the baby when you're leaving the room as this will prevent the latch from making noise, you won't have to turn the knob to close the door. Prevent your toddler from locking themselves in a room Also handy for automatically locking doors, avoid locking yourself out When not in use they can just hang on the knob Can be used on knob or lever door handles Limited number available in most patterns, some patterns only one available Smoke free, pet friendly home 1 for $6.00 or 2 for $10