Strong and attractive key-locking window restrictor offer limited opening when locked, full opening when unlocked, and the key allows control of who can operate the window. Combining exceptional design and high quality materials, these cable restrictors take just minutes to fit, so you won't wait long for that peace of mind. Allow windows to be opened for ventilation, whilst keeping the room secure, and the vulnerable protected. It's not only homeowners using cable restrictors, they are now being widely used in business premises, and public buildings, such as schools and hospitals to help prevent accidents and maintain security. This key-locking restrictor can be used on fire escape windows, if the key is easily accessible.