This amazing product is designed to allow greater airflow and ventilation by keeping the tailgate open but locked. The Cool Dog Car Ventilation Tailgate Lock allows more ventilation into your vehicle than only leaving windows open. Works by fixing the tailgate half-open and with a front window semi-open allows air to flow and circulate through the vehicle helping to keep dogs cool. The Cool dog Lock secured between the vehicle and tailgate will deter all but most determined criminal. Fits nearly all Estate Cars / Hatchbacks / Vans or 4 Wheel Drive vehicles fitted with a rear door.