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 a wide range of 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.