This is a real working cuff. It is used as a closure. This is made with the Jen Pind's Link and is considered micromaille. I custom fit each choker so leave what size you want the choker to be in inches or mmin the notes at checkout. This is not machine done each ring is added to the next by hand. I chose square wire rings over the round ones to give it a hint of sparkle or reflection. It is a time consuming link at this size. The chain thickness is about 4.5mm.