Proskit One Fourth Hex Adjustable Electrician Torque Screwdriver Screw SD-T635-16 SD-T635-0112 SD-T635-510Idea for electronic, computer, communication, motorcycles, bicycle, automobile, truck, heavy machinery, ships, cruise, aerospace industry, high speed rail and more. Accuracy of torque 6. 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