Don't buy that pair off of eBay. I made the mistake of buying those exact knuckles two weeks ago. They are polished yes, but they were scratched to he!! And back before they were polished and they didn't get those scratches out before polishing. They look horrible in person, trust me. I returned them and now there back on eBay.

I don't know if you would consider plastic knuckles, but teckno makes some very beefy knuckles for the maxx.