PRO BIKE TOOL's 2-in-1 Master Link Remover/Connector tool is perfect for the home mechanic. It quickly and easily removes and reassembles even the toughest master links. Compatible with 5-12 speed derailleur chains, it is made from heat treated S2 steel for maximum durability. Taking a huge leap of faith into the world of entrepreneurship, Chris dedicated himself to building a business that produces the highest spec tools at a value making them accessible to all riders.