Our axles are heat-treated twice and induction hardened to produce these heavy-duty axles that are up to 35% stronger than stock 1040 axles. Alloy USA uses the latest cold spline rolling technology, to produce splines that are stronger than traditional cut splines. This 31-spline chromoly rear axle shaft from Alloy USA fits 74-83 Dodge 1/2 ton Pickup and Ramchargers with a 9.25-inch rear axle. Left or right side. Dimension - 37.5 x 7 x 7 in. Item Weight - 24 lbs.