Toyo-M-8 Parts BoxParts Box Japanese Stainless Steel Tool Boxes. These are the real deal like 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.