NKK SWITCHES CO., LTD. is the world's leading professional manufacturer of industrial-grade switches. NKK's technological innovation and product quality have provided more than half a century of convenient, safe and reliable human-machine interface applications to tens of thousands of users around the world. NKK SWITCHES CO., LTD. has obtained more than 500 patents. Many innovative designs have become the industry standard for quality. For example, the unique sliding double crossbar (STC) contact mechanism is recognized as the most reliable design in the world.