The wera joker is an innovative wrench with a unique jaw design its clever design means that it does everything that a conventional wrench does and more made from durable chrome molybdenum steel and coated with corrosion resistant nickel chrome the joker is a truly high quality wrench an innovative metal stop plate means that the joker can hold a fastener in position for screwdriving making assembly easier and quicker the jaw allows safe screwdriving even at high torques due to its extra hard an