RTS Street Forged Axles RTS cut-to-length axle shafts are produced using state of the art equipment and manufacturing techniques. These 4140 Induction hardning steel axles shafts are non-tapered with hardened bearing seats and machined to fit a variety of applications. They feature extra spline on the end so they can be cut to fit your exact length required. When quality is your aim, RTS axle shafts should be your choice. RTS Axle Decal included. 5 x 4.75" & 5 x 4.50" Stud patterns Suits small bearing Note, prior to fitting assembled axle you need to lubricate axle seal surface area to stop seal burn This is a street performance axle and not a high-powered race axle.