HI Joey,
Just some random chain I found at work in a drawer full of odd screws and display board fittings! I made the links slightly longer and narrower by squeezing them in the vice.
The end pieces were fabricated by making a tube, drilling twice and fitting a bit of chain with the end of the lop cut off. The cross bars are a bit of brass tube.
I’m most proud of the R-clips from guitar string through 1/32″holes..
Neil