Brand: PRO BIKE TOOLFeatures: Split & Reconnect Master Links with Ease - 2-in-1 Master Link Remover / Connector tool allows you to effortlessly remove and replace chain links in seconds. No more fiddling around trying to squeeze the tight links together by hand.Dual Purpose, Quick & Easy - Both removes and reassembles master links - rejoin stiff or corroded master links as well as split them no link is too tough! Simply insert the plier jaws into the masterlink and squeeze the handles, its that simple and easy.Have The Right Tools For The Job - Perfect for the home mechanic. Compatible with 5, 6, 7, 8, 9, 10,11, and 12-speed derailleur chains that use a master link.Built to Last, Heavy Duty & Durable - Top quality materials and build. Made from very hard, heat treated S2 steel. Ergonomic handle for comfortable use and to help apply the correct force. Will last the test of time!Pro Quality We are so confident about the quality of our products that if you have any product issues, were very happy to either provide a Refund or a Replacement!