Campagnolo 11-speed chains require this specific Ultra-Link pin for installation. The system doesn't use a master link like Shimano or SRAM chains. Instead, you push this steel pin through the chain plates to join the ends, then peen the protruding end to lock it permanently. The pin measures 5.4mm after installation and features a removable guide section that helps align the pin during insertion. Once the pin seats fully through both outer plates, you break off the guide section and peen the exposed end with the correct tool.

Campagnolo specifies the UT-CN300 chain tool for this job because it includes both the pin driver and the peening anvil needed to properly secure the connection. Generic chain tools that work fine for Shimano systems won't peen the pin correctly, which creates a weak link that can fail under load. The peening process mushrooms the pin end slightly so it can't back out through the plate. Skip this step or do it incorrectly and you risk the chain separating mid-ride. Campagnolo also states you can only open and close a chain link twice before you need to use a fresh pin and pick a different link location for the connection.

This listing includes one pin. If you're sizing a new chain or need spares for future repairs, consider ordering extras since you'll need a fresh pin each time you break the chain. Made in Italy.