1. Pull the lock knob out downside. The locking and unlocking directions are indicated by appropriate icons on the lock knob. 2. Turn the grip in the clockwise direction to increase the torque, and in the clock wise to decrease it. 3. The major scales show the amount of torque in both primary and secondary units. The major scale shows fine increments in primary units. 4. Push the lock knob back to lock the grip. The minor scale may move a small amount to either side of the mark without affecting the sccuracy of your setting. Make sure that you adjust the wrench to the exact torque units your specifications call for, or you will severely under-torque or over-torque, causing severe damage to the equipment you are working on. 5. Do not disassemable the wrench for any reason. Highly stressed internal components may cause severe injury when released in an unintended manner. 6. The wrench should be re-calibrated periodically. The calibration of the wrench should be checked at least once a year, after any abnormal handling or overloading, or after 5000 cycles (clicks) Type: Adjustable Torque Wrench Drive Head: 3/8 inch Knurling Handle: Antislip, comfort grip Torque Range: 5-60N.m Preset Torque: Easy to use Ratchet Head: Reversible Colour:silver+blue Material:steel Package Contents: 1 * wrench Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.