Screwdriver Bit Set 45Pce Boxed Harden 550145

The Classic Hexagon Bit is hardened using a special procedure. The tough version resulting from this method meets the demands across all areas of industry and craft. Based on the Standard Bit, the other bits are optimized by means of various hardening and coating methods. It provides a consistent hardness of ~700HV and features a highly accurate fit in the screw.