Equip your semi to be Ready for the Road Ahead , with the Buffers USA 4-Hole Aluminum Swing Door Hinge, a key piece that provides an easy-to-access door. By utilizing a simplified design that securely attaches a door to the base of a vehicle, this replacement hinge is able to allow for right or left hand opening. Built with ultra-strong materials to bear the weight of a swinging door. FleetPride is your First Click in Heavy Duty .