Classification of manual operation tools used for assembly, repair, and adjustment work in manufacturing sites. Unlike power tools or measuring instruments, this category targets tools that function through human-powered operation. It includes basic work tools frequently used in daily manufacturing operations such as screwdrivers, wrenches, pliers, hammers, files, saws, nippers, and pliers. These are essential tool groups required across a wide range of manufacturing processes, from precision equipment assembly to heavy machinery maintenance.