The NT-M20 is part of the Elesa & Ganter product family and is a cast aluminum safety stop button, or mushroom button, used to help shut down machinery in emergency situations. It is typically used as a part of a larger machine shutdown system, and features a bright red mushroom shape with a yellow warning sign. The button is rated IP67 and features a concealed design to protect against dust and water, which makes it suitable for use in even the harshest industrial environments. It is also available with a variety of contact configurations, including normally open, normally closed, and changeover, so it can be used in a wide range of applications.