Chains come is many styles. Below are some of the common ones found at your local hardware store that are commonly used for bondage.
Proof coil is all-purpose chain.
Transport chain is similar to proof coil but the links are sized to be compatible with the grab hooks used by truckers and loggers.
Pass link has wider links so the links can slide past each other, making it less likely to kink. It’s still “kinky” it just doesn’t “kink.”
Twist link lies flat and does less damage to the skin that other chains making it good for cuffs and collars. It resembles jewelry chain making it popular for everyday wear as a collar or cuff.
Long link is lighter per foot than other chains. Two chains can be joined by putting the end link of one chain thru the center link of the other chain and putting a lock thru the end link of the first chain. This allows the chain to carry the load and not the locking mechanism of the lock, making it useful if you use very light locks.
Straight link is similar to long link, just not as long.
Twist link is best for chain cuffs and collars as the flat links spread the load more evenly over your skin. Any of the other chains can leave small bruises if much force is applied. Proof coil and transport chains are heavier than the more open chains for any given size. Straight, long and pass link chains are easier to attach things to and are generally cheaper. If you’re equipping a dungeon with dozens of manacles attached to the walls and need several hundred feet of chain, you’ll likely use 1/4” or 3/16” straight link, zinc plated chain. Hundreds of dungeons use it.