Connecting links are also commonly known as master links. This connecting link is premium quality and manufactured out of 304-Grade stainless steel. #35-2 double strand stainless steel connecting links are manufactured specifically for #35-2 double strand stainless steel roller chain and are commonly used for connecting two ends of the roller chain together. It is often a good idea to keep a few connecting links on-hand because they are good for making small repairs to the roller chain. This can also keep you from experiencing a down situation. If you have any questions or need more information please contact us, and we will be happy to assist you.