Many bicycle communities seem to think the Crank Brothers multitool is the best of their type.
Feedback from Slickdeals Members from past threads
"Anything I've ever had to fix on the trail can be done with this tool, up to and including truing a bent rim enough to get my buddy through the rest of the day. Solid price for a solid tool at 20 bucks." -GuitsBoy, regarding the 19-Function
"I'm an avid cyclist and racer and use the m19 quite often for quick adjustments." -minh.nguyen.gptx, regarding the 19-Function
"I've had the m19 and m17 for years - used them both for on trail repairs and home repairs, and love them. I've seen a bunch of other multitools over the years, and still haven't found one I liked better. If you ride a bike anywhere further than walking distance from home, get one of these and bring it with you on all your rides." -marc2431