6x10x4mm cast white plated base metal economy lobster clasps, 1.1mm inner diameter loop. Overall dimensions include loop. Lobster clasps (also called trigger clasps and parrot clasps) are one of Rings & Things most popular clasp options. White plating is also known as "imitation rhodium" and "silvertone". Questions? Call our friendly sales staff at 1-800-366-2156, or email us.