What Is the Function of a Screwdriver?

By Staff WriterLast Updated Mar 29, 2020 8:05:34 AM ET
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The function of a screwdriver is to turn screws with slotted heads. Screws that have a single slot require the use of a flat-head or slot-head screwdriver. This is the oldest and most common type of screwdriver. Screws that have tops with a cross need a Phillips head screwdriver, which comes with a four-star point on the tip.