Hex Key L-wrenches for hexagon socket screws (mm) Socket head screws are widely used in machines, metal vehicle construction. The extensive PB Swiss Tools assortment covers the range from 0.71 to 22 mm. The exact adherence to the measurement tolerances and the tough hard special alloys ensure precise, endurable tools which professionals can rely on around the world. PB Swiss Tools hex key L-wrenches for hexagon sockets screws are not only available as chromed models, but rather also powder coated with colour coding and even genuine gold-plated. The numerous variations of longer and shorter hex key L-wrenches with and without ball head fulfil all wishes.