Wiha standard hex bits have tips that are exact fit, precision machined to high tolerances, and are made from durable tool steel. The bits are hardened with computer-controlled heat treatment for maximum durability. Wiha hex bits are designed for applications requiring high wear resistance.Wiha standard hex bits have a universal fit for all standard bit holders and power tools. Wiha bits are guaranteed for their long-lasting performance in the toughest and most demanding applications.