This document discusses ZIPPTORK's bolt tightening technology solutions. It introduces the Torque Controller TCA/TCB that can control the output torque of air impact tools with ±5-15% accuracy. It also describes the Wireless Rotary Torque Transducer TTES/TTEH/TTEB that can transmit torque and angle signals wirelessly for dynamic torque control. Various products can be combined for applications like torque calibration, control during bolting, and verification after bolting. The document also addresses common bolting issues and solutions.