TRS Safety Harness cutting tool. A Mandatory product to be carried in rally cars and advised in all motorsport vehicles. The requirement states they need to be mounted in a position easily reached by the occupants, for best safety practices, buy two and place near the driver and co-driver so either can use them at the same time if required.
If you're hanging upside down in the car, releasing the buckle might be more difficult and every second might just count in a desperate situation. These harness cutters have a Velcro patch on the rear to enable easy, relaible mounting in the vehicle, get the occupants to sit in their seats whilst deciding where to put them.