Replace your weak stock front axle shafts with a set of heavy-duty TeraFlex Axle Shafts! These axle shafts are constructed from high-strength dual-heat treated 4340 chromoly steel and have been profiled for optimal strength. Other features include rolled splines and compatibility with the larger Dana 1350-series U-joint. Tera44 30-spline front inner axle shafts will work with most aftermarket lockers such as the ARB RD117. Tera44 35-spline front inner axle shafts will work with most 35-spline aftermarket lockers such as the ARB RD147.