TSD digital torque screwdrivers are designed for accurate measurement of application and removal torque of screws and fasteners. The TSD measures bi-directional torque in real-time or peak modes. 9 programmable target values can be preset to allow the operator to quickly fasten screws using audible and visual indicators to alert when the target value is reached or passed. The TSD uses standard 1/4" hex bits allowing it to be used on a wide range of applications. An auto-locking bit holder allows for quick changing between sizes.