I bought a 9 piece set but only need the 3mm, 4mm, 5mm, and 6mm for my bike.
I have a Park Tool 3 way 4,5,6 and a little mini 3mm jammy that came with my shifters. The reason I’m bringing these is because the 3 way, or “Y” tool, won’t fit in everything, such as the Paul rear brake spring adjusting bolt. The rear rack is in the way. And the bottle cages, “Y” tools on bottle cage bolts is worse than a punch in the head.
Lesson is, check all the tools you bring fit on all the things you need them.
Cost: about $10 for the set
Made in USA