Model: ‎PH50. Item model number: ‎PH50. Manufacturer Part Number: ‎PH50. This saves wear and tear on the parts, as well as improves stability, especially in sudden motion or braking situations. The 6 hole mount, bolt-on hook works in tandem with the vehicle’s air system to hold the drawbar eye closely to reduce wear, absorb shock, and prevent uncoupling during operation.