The PB Swiss Tools hexagonal screwdrivers for internal hex screws (mm) are used worldwide in machine, metal, and vehicle construction. Professional users choose tools from the wide range available, from 0.71 to 22 mm. Tolerances smaller than a human hair are guaranteed for each hex screwdriver. This perfect precision and the tough special alloy ensure precise, durable tools. Hex screwdrivers are available in chrome-plated versions and powder-coated with color coding. The variety of long and short hex screwdrivers, with and without ball heads, leaves nothing to be desired.