material: premium plus carbon steel drop forged, entirely hardened and tempered cutting edges induction hardened head polished surface finish: trivalent chrome plated to standard ISO 1456:2009 heavy duty double - component handles made according to standard ISO 5746 and EN IEC 60900 Ultimate protection Unior insulated VDE tools ensure ultimate protection even when used around live circuits with up to a 1000-volt potential. The utility of all tools is thoroughly verified by means of the impact strength, electrical, flame-retardancy, insulation adhesion and stamp tests, with each tool being tested individually. High-quality steel Insulated wrenches, pliers, shears, screwdrivers and other tools for working with electrical and other power installations are made of high-quality tool steel with added protection, and designed for simple and safe use. VDE regulations VDE insulated and tested according to the VDE regulations, Unior tools for work in electrically live environments meet the req