
I have been involved with cycling and bicycle mechanics for over fifty years. I had my own bike shop and saw a lot of tools. For a small carry-on tool, minimal but still very useful, this is the best I've seen in all this time. It is an investment cast tool steel (for dimensional accuracy) suitable for 3-6mm and 8mm hex keys, 8-10mm box end wrenches and a small screwdriver. It's too short for very serious leverage with two of the largest allen wrenches, but a 6"/150mm adjustable wrench as a "cheat" will fix it. If you're going on a long day or a multi-day trip, you'll probably need more .(probably tire mounts) but it's as good as most of those swiss army knife style attachments, especially for its size.Sooooo compact.

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