Wera 9524 Solar Photovoltaic Mounting Tool Set 1 Metric 051360430017 piece tool set for installing photovoltaic systems. One adjustable torque screwdriver (pistol handle) 7442 for the measuring range 3. 0 6. 0 Nm. Digital torque value display. Reliable slip over mechanism and audible signal when the set torque is reached. One 889 4 1 F Rapidaptor bitholding screwdriver with fast rotating function for a particularly quick return movement without having to remove the tool during clockwise torque operation. One 6003