The ERA 720 Securi Stay is used for wooden windows and designed specifically with child safety in mind. The Securistay restricts window opening to 75mm (3”). It is manufactured from high tensile aluminium and is available. A special key is used to unlock and the lock can only be disconnected when the window is closed. The ERA 720 Securistay is ideal for high rise buildings as it allows ventilation with safety. Comes in a white finish. easylocks are the UKs main suppliers for ERA 720 Securi Stays.