Pneumatic torque wrench is a hand-held rotary pneumatic tool that can accurately set the torque to complete the locking or disassembly of nuts and bolts; the control part is realized by a pressure regulator and a power management system, and the mechanical part adopts a planetary gear reduction mechanism .

Pneumatic torque wrenches are widely used in aerospace, mining, petrochemical, railway, construction, etc. due to their small size, light weight and high output power per unit weight, which can achieve large torque output, small reaction force, low environmental pollution and low cost. Heavy-duty vehicle assembly and maintenance, heavy equipment loading and unloading, etc., are widely used in product production and assembly lines, especially where high torque is required.