These are the adjustable length Johnny Joint® front upper control arms out of the RockJock® JK off road suspension system. Arms are fabricated from 1.25" o.d. x .188" wall d.o.m. steel tubing, feature the 2" Johnny Joint® rod end on one end, and a formed steel fork and jam nut on the other end. New grade 8 bolts are furnished for the frame end of the arms, while the housing end retains the factory hardware. Arms and ends are finished in semi-gloss black powder coat.