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The Klein Tools 66040 is a five-piece set of slim folding hex-key wrenches in metric sizes, built for tight-access work on bikes, furniture and small machinery. Each wrench folds into a steel handle that doubles as a grip, so the set carries like a pocket tool rather than a loose key ring. Compared with loose L-keys it is tidier and easier to torque, but it covers only a narrow size range and gives up the reach of long-arm keys. It suits riders, assemblers and anyone tightening hex bolts in cramped spots.
In stock
Store links may earn us a commission. Price via Klarna.
Lowest price we've seen: $139.97 on Nov 10 at JB Tools. Tracked across 1 store since Nov 10.
Owners of Klein folding hex sets generally rate the build and convenience highly, calling them handy for bike and household jobs. The common complaints are the short reach and the narrow size coverage.
