Guided by a basic policy of maintaining strong capability in the area of technology development, HHK manufactures metal spring products, such as coned disc springs, flat springs, bearing parts and washers. These products are used not only in automobiles but also in electric appliances, machine tools, construction machinery, railway equipment, bridges, houses and numerous other products. Making use of its superior design and machining technology in addition to original heat treatment technology, HHK is providing customers with high-precision, high-quality spring products to meet a variety of requirements.