Beta Tools 669N Click-type torque bars, rectangular female drive, for right-hand and left-hand tightening, torque accuracy: ± 3%Click type torque bars provide a tactile, audible click at the set torque and use a rectangular female drive for both right and left hand tightening. The tool includes a 60% larger scale and a torque adjusting mechanism that improves setting speed and repeatability. Handle and lens components are chemical resistant for automotive, industrial and aviation environments; the red O ring on the handle end indicates the unlocked state for torque adjustment.