The hybrid design of this magnetic electromechanical lock includes two springloaded, hardened steel jaws that deliver up to 4,000 lbs of ultimate holding power. In a forced-entry assault, the jaws of the MM15 MEMLOCK clamp down on the armature plate and hold firm, for an unmatched level of access control. Mounting plate for easy, accurate installation. Automatic dual-voltage (12/24V). Accepts AC or DC current. Fail safe. Ideal for mental health care and auxiliary detention facilities and other high-risk locations. Dimensions: 6″L x 1-7/8″D x 2-3/4″H, Electrical: AC Current: 130 mA at 12 VAC; 250 mA at 24 VAC, DC Current: 100 mA at 12 VDC; 200 mA at 24 VDC. Operating Temperature: -40 to +140F [-40 to +60C]. Indoor use only.