This strong and attractive key-locking window restrictor offers limited opening when locked and full opening when unlocked. The key allows control over who can operate the window. Combining exceptional design and high-quality materials, these cable restrictors take just minutes to fit, providing peace of mind quickly. They allow windows to be opened for ventilation while keeping the room secure and vulnerable individuals protected. Cable restrictors are not only used by homeowners but are also widely employed in business premises and public buildings such as schools and hospitals to prevent accidents and maintain security. This key-locking restrictor can be used on fire escape windows, provided the key is easily accessible. Key-locking mechanism for greater control of opening. Quick and easy fitting, installable in minutes. Highly versatile, suits all windows and doors. Safe and secure, keeping people in and out. Exceptionally strong, withstanding forces over 1000N.