MC 246 Is a universal magnetic contact with change-over (NC/NO) function that can be used in both alarm and access control systems for monitoring e.g. doors and windows against unauthorized opening. Both the contact and the magnet part are made of Al-alloy and formed in the shape of a threaded screw, which enables easy installation into wood or plastic. With our extensive range of installation accessories, it is easy to install the contact either recessed or as a surface mount on metal and other materials. With appropriate accessories, the contact can even be installed on steel doors, safety valves, garage doors, etc. The contact part is sealed with special epoxy, making it water-resistant.