Classification of electric screwdrivers specialized for assembly and fastening operations in manufacturing sites. Electric-powered drivers that streamline screw tightening and loosening work, including models with torque adjustment functions, shape variations such as straight-type and pistol-type, AC power supply type and rechargeable battery type. Distinguished from impact drivers, this product group enables precise tightening torque management. Intended for use in manufacturing line operations, machine assembly, and electronic equipment assembly, targeting products with specifications such as interchangeable bits, LED lighting, and reverse function.