Amazon is selling a 'handy' folding Allen wrench set for $19, and it's 'a great all-in-one tool'

The Mulwark 17-Piece Folding Allen Wrench Set is the newest tool you should be adding to your kit. Right now, Amazon is offering the 17-piece piece set for just $19.
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Allen keys: everything you need to know

From type to tolerances, our guide to the often overlooked tool Excluding your mind, hands and perhaps bottle opener, nothing in the bicycle workshop is likely to get more use than Allen keys (AKA hex ...