High quality material: The car window safety lock is made of high-quality ABS material. Each stainless steel chain can withstand a weight of up to 10kg and is not easily damaged when pulled. It was specifically developed to protect children and pets. It can block windows, sliding doors, balconies, and other dangerous places, preventing babies and pets from falling out of windows while playing. Two installation methods: The child safety window limiter can be installed through drilling or pasting. It is not easy to fall off and will not damage the surface of furniture. This is the best option, especially if you cannot use screws for installation. No key or password is required. Simultaneously press the button to open it. Adjustable Chain: You can adjust the length of the chain to determine the size of the gap, ensuring proper ventilation and ensuring the safety of your children and pets. The size of the slot varies between 3.5cm and 19cm, which allows for better air circulation. Dual switch mode: The dual switch unlock mode of the child safety window requires pressing the button simultaneously to open the window. It can provide dual protection for children, not only allowing fresh air to permeate, but also effectively preventing children from unlocking dangerous situations by pressing one of the buttons. Widely used: Window child safety locks are widely used in most UPVC, metal, wood, casement windows, and sliding windows. The best choice to limit the opening distance perfectly blocks any danger in your home, and you no longer need to worry about the safety of your children or pets' windows.