The Xfort Viper Fixed Cable Window Restrictor is designed to enhance window safety and security by limiting the opening distance to 100mm, preventing falls and unauthorized access. This makes it particularly valuable for child safety in various environments. It is suitable for all window and door types, including uPVC, aluminium, wooden, and metal profiles. The fixed design ensures it cannot be unlocked, making it ideal for places like hospitals, care homes, nurseries, schools, hotels, high-rise apartments, and upstairs bedrooms where windows should not be fully opened. It provides essential ventilation while maintaining security and comes with multi-substrate fixing screws for secure attachment to various window types. This robust restrictor complies with safety regulations and is an essential tool for any building's safety needs. It features a durable 20cm hardened steel cable that exceeds EN 16281 strength test requirements, withstanding forces over 1000N (1kN).