48-bit insulated screwdriver,YT-28293. Made of S2 steel. The VDE-certified multi-component handle provides insulation of up to 1000 V so that the instrument can be used when working on low voltage installations. Purpose of use /Application VDE-certified tools are a guarantee of safety when working on electrical installations or devices under voltage up to 1000V. YATO VDE tools have anti-slip properties,and the fully insulated series is perfect for working with scratch-prone materials. VDE insulation not only effectively protects against electric shock,but also protects the user against accidental scratching of plastic materials or non-ferrous metals such as copper,brass or aluminum.