... use it to Stick to the door of the cabinet, refrigerators ,cupboard ,so that it can lock cabinet ,refrigerators ,cupboard ,then ... . When you close the door it can automaticly lock it .if you want to open the door you just need to open ... good, the price is reasonable that is why it is popular with the market of Europe, USA, the Middle East, ... us any time, to get the latest price. Baby safety door lock