So this is a little bit more involved than what I do. I thought it might interest some of you though.
This is a small lure making factory and a parts supply place for making your own stuff.
I have bought hooks etc. from LPO with good results though Barlows is still my main vendor for lure parts.
Anyway this is how most of your commercial jigs are made. I have heard in China they use aluminum spin cast molds and have larger machines but I can't verify that.
It is interesting to watch and I hope you enjoy it.