The Ventlock Tailgate Lock allows more ventilation into your car than just leaving windows open. It works by fixing the rear door or tailgate in a semi-open position and combined with a front window open just an inch or two, it allows free flowing air just where the dogs need it most – on their nose at the back of the vehicle. Another major advantage is that with the Ventlock secured between car and tailgate all but the most determined thief will be kept out. It takes only a few seconds to fit or remove and the car can be locked in the normal way using either the key or central locking. Best of all it fits 99% of Estate Cars / Hatchbacks / Vans or 4 Wheel Drive vehicles fitted with a rear door.