Master links have made our lives much easier in the world of bike maintenance, but that doesn't mean chains are completely hassle free. When caked with dirt and corrosion master links can be difficult to remove by hand as they were intended, so reach for the Park Tool Master Link Pliers. The MLP-1. 2 Master Link Pliers are designed with specially sized jaws for fitting into a master link and are easy to use by squeezing together to open the link, or pulling the handles apart to close the link. The pliers are compatible with all chains from 5 through 12 speed that use a master link.