These chains can be used as pull chains for lights and ceiling fans, as retention chain for items such as pens, filler and dust caps, tags, NAS parts, and assemblies. It is also used as larger and stronger key chains, necklaces, identification chains, law enforcement badge holders, and more.
Belcher: This is similar to the trace, a belcher chain link is wider than its thickness. Generally the links are round, but the shape of the link can vary. Curb: A curb chain is when the links interlock with each other when laid flat. Some more open-link curb chains can only be distinguished from a trace by this method.
Also known as square link chain, briolette or Venetian chain. It is made from a round wire that is flattened and formed into a square or box-like shape, which are then interlinked. It is an exceptionally strong chain due to the fact that each square link is sturdy. This type of chain is a usual favorite especially with pendant necklaces.
What is Curb Chain? Curb chain resembles cable chain that has been twisted and flattened, so that all the links lie flat. Curb chain’s flattened loops are typically oval and all the same size. In some chains, the links in the chain may be made round, and then fed through a rolling mill for greater flatness. So you may see chain that has totally round wire, or it may have flattened spots.
Sometimes jewelers and jewelry stores use "snake chain" and "omega chain" for the same jewelry chain. When first researching snake and omega chain, the difference seemed to be that snake chain is round, and omega chain is flat. However, the actual difference seems to be in the structure.