The document discusses ZIPPTORK's bolt tightening solutions, including their torque controller and wireless rotary torque transducers. The torque controller uses patented control algorithms and devices to control the output torque of air tools, regardless of brand, within ±5-15% accuracy. It allows for bolting sequence control and records data. The wireless transducers transmit torque and angle signals to the controller for closed-loop control, compensating for torque loss from factors like joint hardness. The system provides solutions for issues like unstable torque control, uneven clamping, and lack of bolting data traceability.