joker xl 6004 wera adjustable open end wrenchMany users want to have a screwdriving tool that covers as wide a spectrum of applications as possible. They want a single tool for several measurements, both metric and inches. A tool that automatically adapts to the different sizes of screws. That it screws securely, that it does not damage anything, and that allows a high working speed. Thanks to the parallel positioned, self adjusting jaws, various corresponding sizes of open end wrenches are