Na2S is a specialized factory for mechanical metal tools and foreign exporting with rich technical power and exquisite equipment and advanced techniques and fine and complete test and measuring means. Our major products include all kinds of standard and non-standard circular dies, hand & machine screw taps and series of combination thread tools sets according to Metric, German, Japanese, U. S & British System. . The products are well sold in the United States, Canada, Britain, Japan some ten countries and regions since entering the world market in 1978. With flexible system and good management, we are ready to provide you with quality products and good service.