This cutter curb chain from Beagley Braiding Company has a 6 link brushed nickel chain with nylon string ends and knot adjustments. It comes in three colors: black, brown, rust.
Nylon string tie ends
6 link chain
Bit hobbles are used to keep the shanks or the rings together. So if you have a nervous bit lipper, this will keep the shanks from getting twisted. If you need to bit up a cot, this will keep the opposite ring from going through their mouth.
Braided cowboy bit connector.