Chains are those things that loggers use to tie the logs down on the trailers. Also used to pull a truck out of a rut. That sort of thing. The chains for benching or squatting are the exact same thing, but are in 5 foot sections and are hung off the bar so that when you are at the bottom of the lift, the chains are on the floor, and when you lock out you lift more and more chain off the floor.
B.