For tempering and/or carburizing heat treatment to self-tapping screws, drilling screws, wall screws, wood screws, high-tension screws, hexagon screws, nuts, adjustable spanners, rigid spanners, pentagon spanners, hexagon spanners, screw drivers, socket wrenches (main accessories), terminal pressing wrenches, water pipe wrenches, angle wrenches, jack, stationery clippers, razors files, lighter stones, quadrangle nails, shoe wicks, hair clippers, pen clippers, steel nails, washers, finger-nail cutters, fishing hooks, chains, key head hooks, metal components and other hand tools. The photos showed above are parts of heat-treated products.