Hexagon socket wrench, hand-operated 
 With square drive according to DIN 3120 - C 12.5, ISO 1174 
 GEDORE vanadium steel 31CrV3 
 With VDE insulation as per EN 60900 / IEC 60900:2004, two-ply Check-Tool insulation 
 10-12 mm insulation overhang must be added to the lengths stated 
 Sizes 27, 30 and 32: diameter d1 is not standardised