Wera 6006 Joker XS/S Self Setting Double Spanner Wrench 05020330001Self setting double spanner for hexagon screw heads and bolts with wrench sizes 7 10 and 10 13 (metric) or 1 4" 3 8" and 7 16" 8 16" (imperial). With its continuous and parallel jaws, the tool replaces several single spanner sizes. The required size is automatically and continuously set when attaching the tool to the hexagon bolt or screw. The integrated lever mechanism securely clamps the hexagon screw or bolt between the jaws, which significantly