the.com/chain link

means A woven steel-wire fence made of interlocking diamond-shaped links, built for cheap containment rather than curb appeal.

from The 'chain' here comes from the fence's construction — thin steel wire woven in a continuous zigzag, each loop interlocking with the next like links in a chain, rather than literal chain. The weaving technique rose in the late 1800s and early 1900s as a fast, cheap way to mass-produce fencing from wire, and the name simply describes how it's made — functional, literal, and never trying to sound prettier than it looks.