High tensile strength steel is heat-treated, tempered and induction hardened to produce these heavy-duty Alloy USA rear axle shafts. This means you'll be getting an axle shaft that is much as 40% stronger than your factory axle. Alloy USA™ offers a variety of spline counts for a wide variety of axles and uses the latest cold-rolled splining technology, to produce splines that are stronger than traditional cut splines. Rrear axle shafts are offered for both the left & right sides of many trucks & Jeeps. Many applications are also available as a full kit, which include everything you need for installation: both passenger and drive side shafts, seals, bearings and wheel studs. All rear axle shafts from Alloy USA are covered by an exclusive five year warranty to protect you from any defects in materials or workmanship. These rear axle shafts are the perfect thing to rebuild or upgrade your factory axle, order yours today! | Alloy USA Rear Axle Shaft 12189