Proskit 1/2 Square Drive Click Type Adjustable Torque Wrench Hand Tool 60-340Nm 40-200NmAccuracy of torque 3. 0 % Each torque wrench laser serial no. and calibration certificate for future tracing Dual units scale indication Dual units N. m and lbf. in or lbf. ft scale indication. CW CCW torque control Applied to both clockwise and counter clockwise bi directional torque control. Signals by impulse when torque setting is reached Easy Torque adjustment Easy torque adjusting design brings energy saving benefit Positive locking mechanism