The Park Tools MLP1.2 Master Link Pliers are an updated version of the original and best-selling master link pliers. With many non-Shimano derailleur chains master links are used allowing the chain to be installed and removed by hand. This type of master link doesn't require a traditional chain tool but over time dirt and corrosion make it difficult to separate by hand. The Park Tools MLP1.2 Master Link Pliers has cleverly redesigned tips, allowing them to be used to re-join stiff or corroded master links as well as split them. Simply insert the specially sized jaws into the master link and squeeze the handles. Park Tools MLP1.2 Master Link Pliers Features Redesigned tips Simply insert the specially sized jaws into the masterlink Re-join stiff or corroded master links as well as split them More info