This is to help get off crank bolts. I swear I’ve seen it around but I can’t find who makes it right now. It’s a 8mm hex/allen (kinda stubby), and it has 15mm flats just outside that so you can put something like a pedal wrench on it. Might be kind of skinny flats.

I thought this might have been made by pedros, but I don’t see it on their site. I assume this would be steel construction by whoever makes it.

My use case is that I have a medium size portable tool bag, and the regular 8mm hex is fine, except when it isn’t. And i dont carry ratchets, let alone a big one. But I carry a beefy pedal wrench, so the 15mm flats would be perfect for this. Any leads?

Edit: I found it! EVT makes it. https://www.efficientvelo.com/tools/knuckle-saver-pedal-wrench-adapter