A:

I looked at all of these that we have in stock, and none of them have pins with them, not sure what purpose they would have for the clips. I looked at new N5A and N6A helmets in stock, it looks to me that these clips fit between the inside of the helmet and the inpact shell. They tell me you need to lossen the brass ring around the d clips that are in place, and pull the old ones out. Insert the new d clips in and retighten the brass ring.