Child Security:Ensure the safety of children. The safety locks effectively limit the opening distance of Windows and doors to help reduce the risk of injury from falls. At the same time,prevent children from opening doors and windows, resulting in splint injuries. High Quality Product:Safe and non-toxic materials are selected, which will not have harmful effects on human body. The steel wire rope is 3mm thick design, durable and firm. Outer protective gel coat, wear-resistant and long life. High Quality Product:Safe and non-toxic materials are selected, which will not have harmful effects on human body. The steel wire rope is 3mm thick design, durable and firm. Outer protective gel coat, wear-resistant and long life. Ventilation Design:Safety protection, while reserving ventilation. The rope is 155mm long to allow fresh air to circulate. Ideal for keeping your child safe. Wide Application: With its wide application range, this product is ideal for use on your doors, fridge, and cupboards, as well as most outward opening UPVC, wooden, and metal windows around the home or office.