Park Tool, MLP-1.2, Master link pliers

Many modern chains use a “master link" (also known as a "quick link" or "power link") that allows the chain to be installed and removed without driving out a rivet. MLP-1.2 Master Link Pliers make removal and replacement of these master links quick and effortless. Simply insert the specially-shaped jaws into the master link. Then squeeze the handles to open or pull the handles to close the link.