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.
Hand tools and power tools can be used on jobsites or in production facilities to measure, cut, fasten, and form materials. Hand tools include clamps, cutting tools, measuring tools, hammers, screwdrivers, and wrenches. Power tools include cordless and corded drills, drivers, impact wrenches, reciprocating saws, sanders, and angle grinders.