Originally Posted by Andrew R Stewart

I would suggest a quality chain tool like a Park CT-5. Very common and likely the most common replacement pin if one should break. But I'll add a tip. Once the chain is positioned in the too, the pin is screwed onto the chain's rivet and it mbegins to move slightly. Then back off the tool's pin and restart the screwing in. What this does is let the tool's pin better center on the chain's rivet before plunging into the chain's holes. If the tool's pin hangs up on the edge of the hole two things can happen. One is that the chain plate's hole can be punched larger then wanted. The other is the tool's pin can bend. Once bent it is vastly harder to line up with the next rivet and bend further. Andy