Park Tool  CT-4 Master Chain Tool

Specially designed to work with the tight tolerances and narrow profile of 10 speed chains and most high quality derailleur chains. The CT-4 is a powerful, precise tool designed to quickly and accurately remove and install chain pins. Without a doubt the most accurate chain tool we’ve ever built!
• Integrated Link Pocket to ensure precise alignment during use
• Replaceable, rotating pin
• Perfectly contoured cushioned handles
• Precisely machined investment cast body and components
Note: The CT-4 is NOT compatible with Wipperman chains.