I am sure this is an easy question for you all, but....

I am intstalling the Elcon front arms on my MB Pro and I am not sure why there are 2 long threaded set screws in the kit.

I know one of them would be the travel stop, but what is the second one for? Spare?

How much extra would it be to package some directions with thier parts?
Maybe figuring out the parts of the puzzle are half the fun, and it is for me. I would just like to know I am putting it together correctly.

Thanks for the help!