I hate sitting around spining an Allen key or hex wrench endlessly to get a fastener cinched down properly — particularly when there’s no space to spin it without hitting something — so the idea of a ratcheting hex wrench strikes me as first class. The tool end works either in-line with the ratcheting mechanism, or perpendicular to it for those hard to reach areas.
They come in metric and SAE sizes. The metric kit includes 1.5, 2, 2.5, 3, 3.5, 4, 5, 5.5, and 6mm, while the SAE set includes 1/4, 5/32, 7/64, 7/32, 9/64, 3/32, 3/16, 1/8, and 5/64 inch sizes. Both models fold down into a compact 1” x 1” x 4” package so they doesn’t take more room than most run-of-the-mill Allen sets.
Street pricing runs about $17 — also not much more than an average set — though you might find it for less with careful shopping. And if you’re a fan of the Drill Doctor, you’ll be happy to hear that these are made by the same manufacturer.