Allen and Hex wrenches

Allan was similar to the other companies developing similar fasteners and Hex tools in the 1860s. The probable reason was the move to Hex fasteners and drivers is because it was safer for industrial workers and to pay royalties to the Hex companies, but after it was sold it became a success.

From their arrival to the market in 1910, the hex key (which is the thing that screws the Hex drivers in place), has not changed that much. It is a standard L shape and that's really it.

Every house has a screwdriver or hammer, but now you will see lots more Allen wrenches and keys that are used in almost everything from bikes to Ikea furniture.

Even after 100 years, the Hex wrench has not changed all that much, but it's ok since there is. Beauty in simplicity.