VDE-insulated self-adjusting open-end spanner set, 4 piece In a robust textile boxTested tool according to IEC 60900 at 10,000 V for safe working at the approved voltage of 1,000 V. The adjustable VDE spanner fits continuously and automatically all hexagon sizes in the specified dimensions - metric and imperial. The integrated lever mechanism securely engages the hexagon screw or nut between the jaws, WAS significantly reduces the risk of slipping and damage. The ratchet function provides for fast and continuous screwing without offset. By using the corner width prisms, a return angle of traverse of only 30° is possible. The single-arm construction in conjunction with the ratchet function and corner width prism allows work even in confined spaces. The adjustable Joker 6004 VDE has a haptically pleasant handle thanks to the 2-component plastic insulation. Safety is enhanced by slip-proof protection at the front end of the grip. Additional protection by the sliding function for contactle