Select the screwdriver you need according to the screw you have (phillips + or flathead -).
Put the Screwdriver into one hand.
Place the tip of the screwdriver into the head of the screw.
Turn the screw until it can't turn anymore or is completely entered the object.
Turn to the right to screw into or tighten a screw.
Turn to the left to loose or remove a screw.
Screwdrivers are only to be used as a tool for screwing in screws.
Screwdrivers are not to be used to pry things apart.
Screwdrivers are not to be used to make holes.
Screwdrivers should be carried by the handle with the tip pointing down.