Unscrew Joint
To unscrew a joint, do the following:
Slide up the button on the handle of the screwdriver to set the tool in reverse mode.
Place the tip of the screwdriver on the screw.
Press the trigger and hold it firmly until the joint is completely loosen. The trigger must be pressed during the whole unscrewing process.
Do not change the running direction of the screwdriver while in operation, wait until the tool has stopped.