Ordered some shear pins from Memphis Equipment for the Deuce winch. Now in my limited experience all I've heard of or read about were aluminum pins. So; I get my six pins ($1.60 ea.) and they don't look like alum., there to heavy to be alum., and a magnet sticks to them. So I call M.E., the parts guy describes the pin I have says they are some kind of pot-metal and that is what they have been using for about six years. He assures me that they have the same shear rating. Anyone ever seen these ?