While users have few complaints about Milwaukee's M12 hex screwdriver, buyers report that the M4 model's switch is unreliable and that it isn't worth the cost.

An Allen wrench and hex key reference an identical L-shaped tool with a hexagonal tip used for screws or bolts. The origins of the tool go back to 1910, when Allen Manufacturing patented the first ...

Interestingly, there could be another reason for the standard screwdriver handle design, as the ridges make it possible for the tool to fit snugly inside the hex socket of a torque or ratchet wrench.

Hex keys and Allen wrenches are basically the same, with the name Allen coming from the company that manufactures the tool. An Allen wrench and hex key reference an identical L-shaped tool with a ...