Screwdrivers and Nut Drivers
Screwdrivers and nut drivers tighten and loosen fasteners such as screws, nuts, and bolts in materials such as wood and metal. Manual models are available with various heads to accommodate fasteners such as Philips or slotted-head screws. Power screwdrivers save time and effort by driving or backing-out fasteners. They can be used with interchangeable bits to accommodate corresponding fastener heads.