Originally Posted by
andrewclaus
Ball-end P-handle Allens.
This is the correct answer. Park PH-5 is by far the most used bike tool. PH-6 and PH-4 also get some play
Originally Posted by
smd4
Park vintage 4,5,6 mm Allen tri wrench.
Vintage sounds cool, I have an AWS-1, and I'd like for that to be my #1 favorite do-all tool, but the two arms you're not using too often hit stuff and can't spin freely (like trying to work the bolts that adjust seat angle)
Plus the ball- and straight-ends on the PH-x wrenches is immensely useful for low-torque spinning and high-torque tightening/loosening