GDC Zip Hex. Ran across an image somewhere and thought it looked interesting.
$11.25 from Amazon.ca. Arrived today and I've played with it a bit. Nice and light, enough leverage to tighten a seat post, more than enough to adjust a stem etc. Probably not big enough for crank rings or anything tough.
Be handy to attach to the outside of a pack, easier than getting a multitool out.
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Thread: Cool little hex tool