Pentilt is designed for use as a safety device on tilt and turn windows. It prevents forced opening of the window from the outside and accidents caused by falling from windows. Pentilt cannot be opened from the inside or from the outside without the key. Designed for inward opening Upvc windows with tilt and turn mechanisms ensuring safe ventilation. Pentilt can also be used as a lockable sash guard for other types of windows and doors like Upvc, wooden sliding windows and doors, single hung or double hung (sash) windows and aluminium windows and doors. Product comes with a 5 Year Warranty.