Surgical stainless steel screw chain necklace. Even with a chain alone, it will shine and shine. Not only can it be used as a chain for a pendant, but it can also be combined with a ring. You can also wear this necklace as a pair that cannot be worn during work or household chores. Brand: j-fourm. Size: Width: Approx. 0.1 inches (2.5 mm), Length: 19.7 inches (50 cm). Weight: Approx. 0.1 oz (3.1 g). Material: Surgical stainless steel.