Screwdrivers turn screws or other fasteners. Some screwdrivers have magnetic tips to help with positioning fasteners in tight spaces. Warning: Do not use screwdrivers as pry bars. The head of a fastener determines the type and size of screwdriver tip that is needed. The proper tip will fit in a fastener head snugly. Damage or tool slippage may occur if an incorrect sized tip is used. Common types of screwdriver tips include Phillips, slotted, square, Allen, Torx, and hex. Screwdriver tips are also made as bits that can be placed in a socket to ratchet in tight places.