Many modern derailleur 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 sized jaws into the master link. Then squeeze the handles to open or pull the handles to close the link. Compatible with 5-to-12-speed derailleur chains that use a master link, including SRAM AXS and Shimano XTR 12-speed.Features: An updated version of the original and best selling Park Master Link pliers Many non-Shimano derailleur chains use a master link that allows the chain to be installed and removed by hand Allows the chain to be installed and removed without driving out a rivet While this type of master link doesn&';t require a traditional chain tool, over time, dirt and corrosion can make it very difficult to separate by hand Then squeeze the handles to open or pull the handles to close the link.