• Hexagon socket wrench, hand-operated • With square drive according to DIN 3120 - C 12.5, ISO 1174 • GEDORE vanadium steel 31CrV3 • VDE insulation up to 1000 V, acc. to EN 60900/IEC 60900, two-ply Check-Tool insulation • 16 - 18 mm insulation overhang • Sizes 27, 30 and 32: diameter d1 is not standardised