CNC-machined back drive shaft (95 mm) with 2.5 mm pin, made from world-renown HUDY Spring Steel. Strategically-machined, the lightweight drive shaft happens to be weight-reduced without compromising strength. Hand ground for maximum accuracy, then separately calculated and inspected. Recommended to make use of with #325002 Ball Adjust. Diff For 2.5mm Pin - Set - HUDY Spring Steel