Precision machined from solid core aluminum rod, this Heavy-Duty Extension Rod provides the means to lengthen or customize your ProClip Heavy-Duty Mount and includes bolt and wingnut. – The teeth machined into the joints at each end of the rod are specifically compatible with our Heavy-Duty mounts. The interlocking joint design adjusts incrementally by 11.25 degrees. – Compatible with all ProClip Heavy-Duty Mounts – Available in 2, 4, 6 and 8 Inch Lengths