Protect Your Child and Pet: Toddlers are naturally curious and may not recognize dangerous situations. This window safety lock is designed for use with children and pets, helping secure windows, sliding doors, and balconies to help prevent accidental falls during play. Easy to Use: This window restrictor uses strong 3M VHB adhesive for installation, which is durable and does not damage surfaces. It is ideal for situations where screws cannot be used. The locking mechanism does not require keys or passwords, eliminating concerns about lost keys or forgotten codes, providing a convenient and reliable user experience. Adjustable Window Restrictor: Easily adjust the chain length to control the window opening gap, allowing proper ventilation while keeping children and pets safely indoors. The adjustable gap ranges from 3.5 cm to 19 cm, offering greater airflow compared to standard window latches. Upgraded Protection: Features a dual-button unlocking mechanism designed for child safety. Both buttons must be pressed simultaneously to open the window, making it difficult for young children to operate while remaining easy for adults to use. This design provides an added layer of security, helping to prevent accidental unlocking while still allowing fresh air to enter. Widely Compatible: Constructed from high-quality ABS material and a stainless steel chain, this restrictor resists temperature changes and supports up to 20kg of force without damage. Suitable for most UPVC, metal, wooden, casement, and sliding windows. Helps limit window opening distance and enhances home safety for children and pets. Material: ABS + stainless steel Weight: 60g (1 piece)