3/8 inch torque wrench with a range of 20.4-108.5 Nm;Remember to unlock before adjusting the torque value;Make sure to lock after adjusting for the stability of working torque;After the work, please loosen the locking ring of the wrench and adjust it to the lowest value for the next use. Durable ratchet head made from hardened treated Chrome Vanadium steel alloy (Cr-V); bright, full polish chrome finish wipes easily clean and resists rust and corrosion. High-contrast and dual-range scale that is pre-calibrated to ± 4%; Tips: For precise scale adjustment, please use the imperial scale. The conversion formula between the imperial scale and the metric scale is: 1 N⋅m = 8.86 in·lb. Includes sturdy plastic case for storage and portability. Device marking are in ft-lb however N-m conversion chart can be seen in the images/User Manual., Weight: 2.3699693165 pounds, Manufacturer: Amazon Basics