Wera 6004 Joker 2 set 1 Self-setting spanner set, 2 pieces2 piece set. Self setting Joker 6004 wrenches with ratchet functionality. With its continuous and parallel jaws, the tool replaces several single wrench sizes. For metric (19. 0 to 32. 0 mm) and imperial (3 4" to 1 1 4") hexagon screws and bolts. 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