JIMS Machine makes all kinds of specialty tools for just about every American V-twin job imaginable. That's their gig. So it's not a big shock that this wrist pin clip tool is their doing. Incorrect piston clip removal can damage the piston, and incorrect installation can damage the clip. If the clip is bent or damaged it can come out while the engine is running and cause catastrophic failure. For $126.70 (MSRP) you won't have to worry about any of that as this tool (Part No. 5814) is designed exclusively for the Screamin’ Eagle 110-inch engine to ensure proper wrist pin clip removal and installation.