Silver chains are often finished with two different styles of silver clasps, most notabaly the lobster claw or the spring ring. The silver lobster claw is generally 3-6mm wide by 6-12mm long. Lobster claw clasps are generally reliable, study, and easy to open and close. They are typically found on medium weight to heavier weight silver chains, like the figaroa styles, which is in contrast to the spring rings. Silver spring rings are typically a 5mm-8mm in circumference. The circle is made of a hollow tube and open and closes by means of a spring loaded mini lever. Generally, these are found on smaller and lighter chains and bracelets, such as lighter box chains or serpentine chains.