“This set is a great addition to my tool kit.” The Sedy 41-Piece Hex Key Allen Wrench Set is on sale for $18, which is $12 off the original $30 price tag. This bestseller boasts over 280 five-star ...

Hex keys are often taken for granted because they are used so frequently and for so many jobs on a modern bicycle. In fact, it’s sometimes difficult to find a bolt on a bicycle that doesn’t have a hex ...