I was watching a YouTube video. https://m.youtube.com/watch?v=5FpAIjPffUo# and around 17 minutes I see these 2 massive aluminum jaws for holding offset turnings. I have searched everywhere and can not locate them to purchase, maybe in Germany or he has made them. I found a few made out of wood from diy sites but none metal. Does anyone know where to purchase them? Thanks, Roger.