Classification of manual tools used for screw tightening and loosening operations in manufacturing sites. Essential basic tools for machine assembly, equipment maintenance, and parts replacement work, including Phillips screwdrivers, flathead screwdrivers, hex drivers, Torx drivers, and precision screwdriver sets. Distinguished from electric drivers and impact drivers, this tool group specializes in precise manual tightening operations. Frequently used in manufacturing for machine equipment assembly/disassembly, control panel wiring work, and precision component installation tasks.