Air Foxx AFZ-TQA0093 1/2-Inch or 3/8-Inch Drive Digital Torque Adaptor, 20-200-Feet Pound Easy to use settings allows you to set tork quickly, with lighted LCD screen Certificate of Calibration Accuracy: + /- 1% Vibration and buzzer lets you know when tork is achieved Unit conversions adjustable on handle Memory feature allows you to go back and forth between tork adjustments