The AWS TT-CA Torque Arms, Calibration Arms, Torque Wheels, Calibration Wheel is AWS TT-CA series of calibration arms are designed for calibration and verification of torque measuring equipment. The AWS TT-CA Torque Arms, Calibration Arms, Torque Wheels, Calibration Wheel isy can be used by metrology labs and QC departments to test and adjust torque torque transducers and sensors. We offer a range of arms from 1 to 48 inches in length to calibrate equipment up to 1000 ft-lb.