Accuracy ± 2 % (6391-10: 6 %) of the set value (in the direction of operation). Usable by rotating the insert tool for right and left threads. Plug connection for accommodating 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, or 7903E, or another suitable device. All wrenches in this series (HAZET 6391-6392) are without an adjustment scale. Comes with calibration certificate and serial number. DIN EN ISO 6789-2:2017. Made in Germany. Output: Insert square 9 x 12 mm. Dimensions / Length: 241 mm. Net weight: 0.28 kg. Nm min-max: 5 - 50 Nm. Tolerance: 2 %. Effective length of the torque wrench min-max l1 mm: 231.00 - 231.00 Nm. Operating force min-max kg: 2.2 - 22.1 kg. Adjustment tool dimension l2: 30 mm. Head thickness a: 17 mm. Head width b: 22 mm. No more backing off: Long-term durability tests have shown that for HAZET torque wrenches in the 5000 and 6000 series, backing off to the smallest scale value is not necessary.