Wera 6006 Joker 2 Set 1 Self-setting double spanner, 2 pieces2 piece set. Self setting double spanners for hexagon screw heads and bolts with wrench sizes 7,0; 8,0; 9,0; 10,0; 11,0; 12,0; 13,0 (metric) resp. 1 4"; 5 16"; 3 8"; 7 16"; 1 2" (imperial) and 13,0; 14,0; 15,0; 16,0, 17,0; 18,0; 19,0 (metric) resp. 1 2"; 17 32"; 9 16"; 19 32"; 5 8"; 11 16"; 3 4" (imperial). With its continuous and parallel jaws, the tool replaces several single spanner sizes. The required size is automatically and continuously set