IREGA SWO 92 1000V/SBE-6"-150mm Total length SW up to 34mm = 1 3/8". The adjustable insulated ring spanners with insulated handles can be used from -20°C to 70°C. For work on or near voltage installations with nominal voltages up to 1,000 V (AC) and 1,500 V (DC). The insulated material was selected based on its mechanical, electrical, and thermal properties. The insulated material is flame-retardant. Certified according to IEC 900 and EN-60900.