What is an Allen key?
The Allen key is an everyday tool that goes by many names. Commonly known as a hex key, Allen wrench, zeta key, or hex head, the Allen key is a six-sided tool used as a driver for screws, bolts, and other fasteners designed to fit the tool. The name “Allen wrench” came from the Allen Company, a Hartford, Connecticut based manufacturer who produced the tool. Since then, the tool has gone by many names as numerous manufacturers have produced variations of the wrench. The Allen key comes in several different shapes and sizes, but the most typical shape for an Allen key is an L-shape. This allows the user to take advantage of the wrench’s reach –- while using the longer arm of the L-shape –- or its torque capabilities while using the shorter arm of the L-shape. Some Allen keys come with a ball end on the longer arm of the L-shape to further aid in reach and allowing the wrench to be used at odd angles. The ball end, however, should not be used for torque purposes, as it can easily slip and
