Cable chain is unsoldered, can be separated with pliers. And it's rolled with a plastic spool.
In general, stainless steel is designed for strength and durability, with its high resistance to corrosion being of its primary attributes, and nickel is a key element in the alloy that helps provide this.
They can be matched with jump rings and clasps, as well as acrylic beads, glass beads, gemstone beads to be popular necklaces, bracelets and belts.