Precision Measurement Our torque screwdriver provides precision torque measurement from 10 to 50 inlbs115.6 N-m) / 10 to 70 in/lbs(1.1-7.9 N/m) / 20 to 70 in/lbs(2.3-7.9 N/m) / 5 to 40 in/lbs(0.6-4.5 N/m), with an accuracy range ±5%, 1 in-lb (0.1 N-m) / 5 in-lb (0.6 N-m) / 2 in-lb (0.2 N-m) / 0.7 in-lb (0.08 N-m) increment. The product is also equipped with different bits, such as plum blossom, hexagon, word, and cross. And some of the types are equipped with a 1/4" to 1/2" conversion head. We meet the GB/T 15729-2008 regulation. Sturdy & Material Our screwdriver torque wrench is constructed from premium steel aluminum alloy and rubber material The head is made of hardened chromevanadium steel The rubberized handle is comfortable to grip antiskid, and corrosion-proof. All of these materials extend the wrench's service life. Easy Operation: The torque wrench screwdriver will emit a click sound when the set torque value is reached. It aims to remind you to stop applying force to prevent over-torque damage. And our torque screwdriver electrician can both operate in a clockwise and counterclockwise direction. Calibration: The inch pound torque screwdriver with handle scale adopts technology. The dual-range scale is straightforward to read, not easy to wear. With high accuracy, it is more professional to use. Versatile Application: This adjustable torque screwdriver comes with a carrying case that shields it against wear & tear when not in use to deliver longlasting performance It is for electrical light industries machinery manufacturing scientific research structure and other industries