High quality chassis series products. Made of high-strength steel tubes for superior strength and durability. Stable performance, reliable quality and long service life. Uniform thickness, no gas bubbles, slag, cracks, breaks or incomplete fusion. Measured by specialized inspection tools after welding to ensure that the assembly hole, bushing insertion and installation dimensions are correct. Professional installer is highly recommended (instruction manual not included) Alignment after installation is highly recommended. With the action of the automatic hub, the front wheel can rotate freely. This reduces unnecessary wear between components. To some extent, the hub assembly can help the car save fuel, provide maximum grip and traction when off-road driving or towing. Compatibility Chart: Ford For 2009-2010 F-250 Super Duty Cabela’s 4WD For 2008-2009 F-250 Super Duty FX4 4WD For 2005-2010 F-250 Super Duty (Submodel: Harley-Davidson Edition, King Ranch, Lariat, XL, XLT) 4WD For 2009-2010 F-350 Super Duty Cabela’s 4WD For 2008-2009 F-350 Super Duty FX4 4WD For 2005-2010 F-350 Super Duty (Submodel: Harley-Davidson Edition, King Ranch, Lariat, XL, XLT) 4WD For2009 F-450 Super Duty Base 4 X 4 For2009-2010 F-450 Super Duty Harley-Davidson Edition 4 X 4 For2008-2010 F-450 Super Duty King Ranch 4 X 4 For2005-2010 F-450 Super Duty (Submodel: Lariat, XL, XLT) 4 X 4 For2008-2009 F-550 Super Duty Base For2008-2009 F-550 Super Duty Base 4 X 4 For2005-2010 F-550 Super Duty (Submodel: Lariat, XL, XLT) 4 X 4 Package Contents: Front Hub Lock