JKS Manufacturing Forged Series Adjustable Control Arms. These new arms follow a traditional Jeep adjustable arm design utilizing a forged adjustable flex end and jam nut setup for adjusting the length. The forged end is fully rebuildable and greaseable. 1-1/4”-12 threads provide ultimate strength and fine-tune adjustability. The arms are made from DOM tubing and incorporate a unique hex shaped weld-in threaded bung for easy tightening of the jam nut. The arms also feature factory style rubber bushings at the non-adjustable ends for quite, maintenance-free operation. All arms are CNC formed for proper tire, frame and axle mount clearance. The durable and sleek all-black paint scheme provides a clean look. The small JKS oval decal lets everyone know you bought the best. These new kits are a great together or as a complement to the JKS adjustable rotating arms in most any existing suspension system.