A screwdriver is a tool used for driving screws. It consists of a handle and a shaft, ending in a tip that is put into the screw head before turning the handle. They can vary in size and can be used for different types of screws.

Slotted drives have a single horizontal indentation slot in the fastener head.
Cross drives have two slots, oriented perpendicular to each other, in the fastener head. The slotted screwdriver can be used to drive two slotted screws by driving just one of the slots.
Square drives have a square-shaped socket in the screw head. These types of screwdrivers are used in woodworking and in general construction.

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