The XQB178/8 closed power tong is the same as the foreign 58- 93R closed tong. It is a power tong for safely and accurately fastening and unfastening 15/16 "-7" oil casings. It is used in oilfield workover operations. A special machine for loading and unloading tubing threads. It is a heavy-duty workover power tong suitable for casings with a maximum diameter of 7". The maximum torque exceeds 8 kN.m, which is suitable for workover operations under various complex working conditions.