When properly positioned, Safety Pins with deck lock bars prevent the gooseneck from disconnecting from the trailer when in operation. Safety Pins rest in a notch on the top of the beam hooks. When the beam hooks are nested on top of the cheek plate hooks, the safety pins hold this connection in place. The Safety Pins automatically unlock and lock each time the gooseneck is detached. These Safety Pins are standard on most ROGERS detachable gooseneck trailers.