Allen wrench in an L-shape with a tip size of 1. A hex key suitable for all types of use by professional mechanics, plumbers, carpenters, and electricians, as well as for home use.

The hex keys are made from a single piece of hexagonal steel rod with blunt ends that fit comfortably into corresponding hexagon-shaped screw holes. It is bent at 90 degrees, forming two arms of unequal length that resemble the Latin letter L.