Wipperman actually suggests that the links can be used until the pins wear down to .136 inch in diameter, from their original .142. Wipperman provides a new link with every chain, so they really don't intend for the links to be used more than once. Contrary to popular belief, Wipperman does not make connex links that are intended for use with other chain brands. They do happen to fit Shimano or KMC chains properly.