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