Wera 6006 Joker M/L Self Setting Double Spanner Wrench 05020331001Self setting double spanner for hexagon screw heads and bolts with wrench sizes 13 16 and 16 19 (metric) or 1 2" 5 8" and 5 8" 3 4" 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