This FlexArm joint field rebuild tool from the house of TeraFlex is especially designed to make joint rebuilding simple. They have made this repair tool simple to use. It comes with two open-ended sockets and wrenches. If you';re looking to rebuild FlexArm joints, using a bench vise is particularly useful. This repair tool is meant for smaller FlexArm joints and is meant for the JK Wrangler, LJ Wrangler Unlimited, JKU Wrangler Unlimited and the TJ Wrangler.