Features: <br> <br>1. Torque Range: 10-90 in. lbs. <br>2. Tolerance of Torque: ±6%. <br>3. 1/4-inch (6.35mm) hex bit holder. <br>4. Easy-to-read laser torque scale. <br>5. Feature aluminum scale and tube to reduce weight and enhance durability. <br>6. Slipping clutch mechanism to prevent over-tightening when reaching the pre-set torque. <br>7. Ergonomic shape with non-slip and comfortable features. <br>8. Each torque screwdriver with laser serial number which can be traced easily. <br>9. Spring-loaded locking collar locks the scale when the torque is setting. <br>10. All torque screwdrivers are made of the best materials which can reach the exacting tolerance. <br>11. Quality meets DIN ISO 6789 & ASME B107.300-2010. <br> <br>Materials: <br> <br>* Bit Holder: S45C with electroplating <br>* Hexagon Knob: anodic treatment <br>* Graduated Ring and Tube: aluminum with anodic treatment <br>* Grip: TPR <br>