Carbon Steel Ball Chain Gunmetal Necklace Large Bead, 4.8 mm, 30&rdquo; Ball Chain Necklace is made of solid carbon metal steel. Highly durable neck chain has 45 lbs of tensile strength. This chain can be used as a stand-alone neck chain or wrap around bracelet. It can also be used as a knife necklace and perfect for art and jewelry projects. Perfect replacement necklace for pendants that need a heavy duty chain. It is sturdy and can withstand everyday use. Proudly made in the USA.