Features Preset Torsion Screwdriver: Set torsion value and prevent over tightening for prioritized fastening control. Suitable for locking screws on high accuracy instruments and circuit boards Wide Application: Suitable for various electrical, light industry, mechanical manufacturing, research institutions, and other fields. Suitable for occasions with high demand for locking accuracy Simple Adjustment: Provide simple and fast preset torsion adjustment, clockwise and counterclockwise automatic switching, loading handwheel control, which is convenient and effortless Specifications: The torsion setting range from 1 to 6N.m, with 0.1N.m graduation and ±6% accuracy. This screwdriver is equipped with 6.35mm (1/4 inch) hex interface for stable connection Sturdy and Practical: Using a straight scale with a secondary scale, ensuring the reading is clear and accurate; The screwdriver sleeve is made of nylon material, which is sturdy and wear resisting Specification: Range: 1-6N.m Graduation: 0.1N.m Accuracy: ±6% Interface Size: Hex 6.35mm (1/4 inch) Size: Approx. 156 x 36mm / 6.1 x 1.4in How to Use: 1. Set the torsion value of the screwdriver according to the torsion required for tightening fasteners. To preset the torsion value, grip the middle body with one hand, pull out the loading handwheel with the other hand, rotate it to the desired torsion, and release the loading handwheel to return it to the starting position. Torsion value presetting is completed. 2. Select the bit from the accessories based on the head shape of the fastener, insert it into the hex socket of the screwdriver (if there is no suitable bit in the accessories, you can make a bit for connection yourself). 3. Install the corresponding size bit on the screwdriver, hold the handle to align the bit with the fastener, rotate the screwdriver until the tightening torsion of the fastener reaches the set value, and the screwdriver will make a click sound and obvious hand vibration to indicate the completion of the installation. 4. If not in use for a long time, adjust the scale line to the minimum torsion value and store it. Package List: 1 x Screwdriver 10 x Screw Bits 2 x Storage Boxes 1 x User Manual Package List 1 x Screwdriver 10 x Screw Bits 2 x Storage Boxes 1 x User Manual