Hardened alloy tool steel takes the repeated impact of driving chain rivets, but eventually the pin tip on any chain tool wears down, mushrooms, or snaps. Park Tool's CTP Replacement Chain Tool Pin is the factory replacement for their most widely used chain tools, including the CT-1, CT-2, CT-3, CT-3.2, CT-3.3, CT-5, and CT-7. If your pin is bent or broken, this gets the tool back to working condition without replacing the whole unit.

The CTP is a threaded pin that installs with a 7mm or 9/32" 12-point box end wrench. Each replacement pin comes with anaerobic threadlocker pre-applied to the threads, so you don't need to source your own Loctite. Torque the pin to 7-9 Nm and periodically check that it stays snug in the handle assembly during regular use.

One thing to double-check before ordering: the CTP only fits the chain tools listed above. If you're running a CT-4 series master chain tool, you need the CTP-4K instead. If you have a folding chain tool like the CT-6, CT-6.2, or CT-6.3, or a multi-tool like the MT-40, MTC-40, or MTB-5, those use the 985-1 pin, which has a different thread and wrench size. The CTP is not interchangeable with either of those.