For use when manufacturer's specifications call for fasteners to be tightened after torque loads are applied, called the Torque + Angle Method. The adjustment arm keeps angle scale stationary, two lengths provide additional flexibility in placement.  

Female by Male reducer adapters are primarily used with torque calibration systems. For adapting a variety of drive ends from 1/4” to 1” square drives. 

Handy ratchet adapters convert dial torque wrenches or any plain head wrench into a ratcheting drive.