Either keep windows shut securely or allow them to be opened to a limited degree for ventilation, yet still prevent small children from escaping through them. Use window guards to prevent a child from opening the window and falling out. particularly double-glazed windows and make sure they do not present a barrier to exiting the home in the event of a fire. Item：W262 NAME：Sliding Window Lock QUANTITY：240 SETS G.W：7 KG DIMENSION：38×32.5×37CM