Slider door safety lock we used at Kalahari to secure the door to the balcony. Great for childproofing in general but I specifically use this lock to prevent elopement or curiosity [autism]. • Place this over one slim piece of the slider track and tighten down the screw that’s attached. That thing ain’t movin! •Check my other posts for the hotel type door lock we use to prevent wondering/eloping while traveling! travelessentials waterparkessentials autismtravel autismessentials autismsafety LTKKids LTKTravel