Window security with twist lock convenience Simple and effective twistlock restrictor for limiting window opening when locked and full opening when unlocked. Designed for ease of operation and manufactured using high quality materials these safety restrictors take just minutes to fit. Cable restrictors allow windows to be opened for ventilation whilst keeping the room secure and the vulnerable protected. Its not only home owners 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 keyless restrictor is suitable for use on fire escape windows. Features & Benefits Simple Twist Operation accessible keyless locking Quick and Easy Fitting can be installed in minutes Highly Versatile suits all windows and doors Safe and Secure keeps people in and out Exceptionally Strong withstands forces over 1000N Safe Ventilation allows air to cir...