VDE stainless blade with reduced blade diameter with integrated protective insulation - low-lying screw and spring elements can be easily reached and operated. Individually tested tools as per IEC 60900. Individually tested at 10,000 V for safe working at the approved voltage of 1,000 V. Wera's stainless steel tools are vacuum ice hardened and therefore have the hardness and strength properties required for screw connections. Industrial use is possible without restrictions.