MC 370-S11 is a high security magnetic contact set with NC function that can be used in both alarm and access control systems for monitoring doors and windows against unauthorized opening. The contact is specially designed for use in banks, museums, art galleries, stores, etc. This set includes MC 370 and the plastic adapter set MC 300-S11 for recessed installation with screws in non-magnetic door and window frames. Both the contact and the magnet part are in a water proof (IP 67) plastic housing, which enables easy installation in wood without additional accessories. Contact and magnet are paired. To ensure proper functionality, do not replace the contact or magnet alone.