Our Camburg MIG shackles replace the stock light-duty version on your F-150. The stock shackles are stamped out of thin metal and use a rubber bushing which both allow for a flexy component that also binds as it cycles since the rubber bushings are vulcanized into the shackle. Our shackles are a fabricated boxed gusseted design that is much stronger and use polyurethane bushings that pivot smoother with less flex. They are MIG welded and we powder coat them a textured black. They are ready to be bolted on using the factory hardware. These are available in a stock length, so they do not raise or lower the ride height or an 1.5" extended version that will lower the ride height about 1". Both are designed for stock and Deaver leaf springs, the "stock length" versions do not work with icon leaf springs. CAD Designed, CNC Laser Cut and Formed MIG Welded Polyurethane Bushings Powder coated textured black Made in the USA The stock length shackles are 4.5" eye to eye and the extended are 6".