BabyDan Window and Door lock restricts the opening of a window or door to a maximum of 15cm. It has a modern design and ensures that it doesnt draw attention or affects the aesthetics of the window. It comes with a key, which means that the locking mechanism cannot be unlocked or removed without the key holders knowledge. Made from solid stainless steel, the restrictor is completely tamper proof. Restricts the opening of a door or window to 15cm. Features a 5 cylinder lock and is fully tested to en13126-5 and will withstand force up to 550kg. The window lock is made from stainless steel wire wrapped in a plastic coating and a fixing plate made of zinc alloy. Easy to install and suitable for domestic or commercial use and for all age groups. Will fit all types of windows including wood, metal, uPVC and aluminium. Includes 1 window and door restrictor.