These are the adjustable length Johnny Joint® rear upper control arms out of the RockJock® off road suspension systems for the Jeep JL & JK Wranglers. Arms are fabricated from 1.25" o.d. x .188" wall d.o.m. steel tubing, feature the 2 1/2" Johnny Joint® rod end on one end, and the 1" RH thread forged 2 1/2" Johnny Joint® and jam nut on the other end. Arms are finished in semi-gloss black powder coat and the forged ends are finished in gold zinc plating.