Park Tool CT4.3 - Master Chain Tool with Peening Anvil for 5-11 Speed

Designed to work with the tight tolerances and narrow profiles of 10 to 12-speed chains, but also works on all other derailleur, and standard 1/8” width single-speed chains. The CT-4.3 is a powerful, precise tool designed to quickly and accurately remove and install chain rivets. Without a doubt the most accurate chain tool we’ve ever built

Compatible with 1/8” single-speed and 5 to 12-speed derailleur chains

Includes removable peening anvil for peening Campagnolo® 11-speed chains

Integrated Link Pocket ensures precise alignment

Perfectly contoured cushioned handles

Precisely machined investment cast body and components

Replaceable rotating pin (part # CTP-4K)