The handle insulation material fulfils the requirements of IEC 900 and EN-60900 as far as it concerns the electric strength and the mechanical properties.
Every IREGA 92-1,000V adjustable wrench undergoes a HIGH VOLTAGE TEST, according to EN-60900 Standard, equivalent IEC-900, and consisting of a 10,000V charge for 10 seconds, after which there should be no damage to the handle.