The Crown ball base contain mounting holes aligned to work with Crown Work Assist® clamp accessories. The addition of the RAM mounting system allows you to position your accessories for the best access and prevent damage due to shock and vibration. This is a light weight mounting solution up to 6.75kg weight (approx 15 lbs)
Material: Powder Coated Marine Grade Aluminum
Ball Size: 2.25" Rubber "D" Ball Size
Note: The "U" in the part number reflects product packaged in poly bag.