You probably have a dozen Allen Wrenches somewhere, but if you can't find any of them and need to put something together, ...

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 two piece set for just $16, saving you 44%.

Allen wrenches and Hex keys seem very similar to each other. We break down the relationship between the two and some other innovations that have come since.