It is as LONGBOX55 says the are splined to lock them in place. As well I agree with the new nuts. However they are lock nuts so lock washers are not necessary.
As well I forgot to mention that they are black anodized. At least mine are.
With all of those points that is why I was wondering if anyone had ordered them from LMC. I just don't want to spend the money and then have to deal with eating the money or the return policy.
By the way, I cannot find them on any other suppliers site.
