Offset links are also commonly known as half links. This offset link is premium quality and manufactured out of 304-Grade stainless steel. #25-2 double strand stainless steel offset links are manufactured specifically for #25-2 double strand stainless steel roller chain and are commonly used for adding additional links or making repairs on the roller chain. 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.