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/replacement of these master links quick and effortless. Read more.
NOTE: The MLP-1.2 will not remove or install the style of master links with both pins attached to one plate and a side plate or spring clip that clips onto the pins. These are commonly found on older drivetrain systems or single speed bicycles. To remove these types of master links, use a needle nose pliers such as the Park Tool NP-6.