The screwdrivers each have an ergonomically developed, 3-component handle of polypropylene and thermoplastic elastomere with permanent colour codes at both ends of the handle as a timesaving aid for application identification. The finished blades are black oxidized and entirely hardened. Conform to: IEC 60900, DIN -EN 60900, EN 60900 and VDE 0682 part 201. These screwdrivers conform to the latest national and international standards: - examination piece-wise in water bath with 10 KV. - marking with the year of manufacture. - intensified cold stroke test.