Toyo-GT-350Toolbox with Three Cantilever Trays Japanese Stainless Steel Tool Boxes. These Boxes are the real deal works of art! Established in 1969, Toyo Steel was the first company in the world that successfully developed a deep drawing technology to make a seamless steel toolbox from a single sheet of steel. Their toolboxes are seamless, light weight, with a round gentle handle and no sharp corners. They also have outstanding durability and functionality.