I bought this to prevent my children from entering the room while I was teleworking, but I'm not using it anymore, so I'm selling it. [Product Description] Easily lock doors without a door lock! Easy to install and remove! Overview of Guard Lock Interior/Lock-Free Interior Door Only Easy Lock No. 260 Uses/Features ● Easily lock doors without a door lock! ● Easy to install and remove! ● You can easily lock the door without damaging it. Locking/Unlocking Method Locking method: Hook the plate onto the metal fitting. Close the door and insert the lock body into the groove to complete. Unlocking method: Turn the knob to the left, and then pull out the lock body. Please be sure to check: There are no steps on the mounting surface. It cannot be used on doors where the strike plate is lower than the mounting surface. Caution ● This is not absolute in terms of crime prevention. ● It may not be possible to install depending on the shape of the door frame metal fittings.