The famous reusable Connex Link, now for 12-speed chains. No tools are needed! This master link allows easy install or removable of your bicycle chain without tools! This new 12-speed steel Connex Link is a beautiful piece of functional art, making it easy to install or remove your chain in seconds, by hand, without tools. And you can do it as often as you like. This makes chain and drivetrain maintenance a breeze. "It's the only link you will ever need for your drivetrain no matter what system you have. Thank you Canitoeroad! This makes chain removal a snap, either for cleaning or repair." Rating: 5 stars - Eugene Castellano - 4 December 2023