PATLOCK has been designed and developed in the UK to assist home owners in securing their property against burglars and the growing trend of lock snapping. Most forced entry burglaries are committed through the weakest point at the rear of the property, usually the Patio or French Doors. Entry to French Doors fitted with standard handles and locks can be forced in less than 30 seconds. Fitting a PATLOCK removes the risk of lock snapping as your doors are held secure even without any locks in the doors. Locking systems on French Doors are operated by the door handles. If the handles are held secure all shoot bolts and levers remain in the locked position ensuring the doors cannot be opened. PATLOCK works by holding the interior handles secure once the shoot bolts and levers are in the locked position. This stops the exterior handles from being operated and the doors unable to be opened from the outside. Box Contains 1 x Patlocks 1 x Pair of Tamper Resistant Spindles 2 x Window Stickers 1 x Instruction Leaflet