Basically there is 3 things to consider when looking at a axle shaft 1) material... and dr diff says its the same as the big dollar axle which you have to take his word on without doing material analysis 2) how are the spines installed, ground, rolled,ect 3) rockwell C are they the same rockwell as the big dollar axles, you dont want them too hard or they tend to snap or too soft and they tend to wind up like a pretzel
