The MagForce 40 Series featuring 600 lb. holding force and the 70 Series with 1200 lb. holding force. These Mayflower locks boast real magnetic bond sensors assuring security, auto-matic voltage selection for simple connection plus a built-in door status monitor for accurate indication of door position. Additional features are stainless steel housing, low amp draw, simplified armature installation and UL10C 1 hour fire rating.