I had mine come loose at the ramp last Saturday, it was a locking pin with the lock in place Don't know how it happen but I found the pin in the Parking Lot late the next day when I was putting in. I was a older pin but in tack without the lock. Chocked the boat trailer with rock got in lifted and bach on the ball. I had a non lock spare pin in the Burb Just Thank the good Lord it did not come loose at 70 plus on the road Check you Pins I went an purchase the High Dollar Reese SS lock Pin but will check it offen Just a Heads Up