Accuracy ± 2 % (6391-10: 6 %) of the set value (in the actuation direction). Usable by rotating the insert tool for right and left threads. Plug connection for the reception of insert tools. Fixed adjustable value. Particularly suitable for use in industrial mass production. Setting the desired torque value with combination wrench 6399 in conjunction with HAZET testing device 7901E, 7902E, 7903E, or another suitable device. All wrenches in this series (HAZET 6391-6392) are without adjustment scale. Comes with calibration certificate and serial number. DIN EN ISO 6789-2:2017. Made in Germany. Output: Insert square 14 x 18 mm. Dimensions / Length: 631 mm. Net weight: 1.03 kg. Nm min-max: 60 - 320 Nm. Tolerance: 2 %. Effective length of the torque wrench min-max l1 mm: 627.00 - 627.00 Nm. Actuation force min-max kg: 9.8 - 52.0 kg. Dimension of the adjustment tool l2: 38.5 mm. Head thickness a: 23 mm. Head width b: 30 mm. No more back-turning: Long-term durability tests on HAZET torque wrenches of the 5000 and 6000 series have shown that back-turning to the smallest scale value is not necessary.