Here’s a thread all about those workshop tools that are just the best ever at one specific thing. I used to hate bottle cage bolts in some bottle cages. Just no way to reliably get something in there to run the threads of the bolts and I was always fiddling with hex keys that didn’t quite fit. THat was until I came across this little beaut:
The park tool pin spanners are fantastic for holding bar tape while you are wrapping it and need to let go of the tape. I use it on aero and round bars and works well on both. Very niche and specific use but surprisingly useful
A 1/2” socket extension, cut into pieces roughly 106mm and 98mm long. Insert into a Cannondale hollowtech crank axle (after removing the retaining crank bolt) so you can use any standard crank puller, like the Park Tool CWP-7, to remove Cannondale cranks.
The two lengths are needed for the difference width axles.