material: premium chrome vanadium steel surface finish: chrome plated according to ISO 1456:2009 made according to standard ISO 6787 and EN IEC 60900:2018 Advantages: double layered - double coloured insulation for additional safety controlled according to standard EN IEC 60900 with scale Important! if second layer is visible, replace your insulated tool with a new one. Caution! Adjust the tool before using! Adjustment while working is life dangerous.