This electric magnetic lock consists of an electromagnet and an armature plate used for access control door locks. By attaching this to the door frame and the armature plate to the door, a current passing through the electromagnet attracts the armature plate, holding the access control door lock shut. When power off, the door will open. It is suitable for wooden door, glass door, metal door, fire-proof door,etc. Feature: Use magnetic power to lock the door, 180kg(396.8lbs) holding force. Made of high strength aluminium alloy material with hard anodized processing, heat dissipation and anti-corrosion with high reliability. Secure NC mode: unlocked when power off, locked when power on. Suitable for wooden door, glass door, metal door, fire-proof door. Anti magnetic design, wear resistant material manufacturing. High quality electromagnetic material vacuum treatment, double lock body insulation treatment. Comply with environmental protection requirements, low power consumption, super quiet design, no noise during operation. Various unlocking function options: keys, manual, remote control, intelligent induction, telecontrol, and so on, directly matching with building intercom. Unique integrated design, easy installation. Spec:Condition: 100% Brand NewMaterial: Aluminium Alloy + Metal PlateColor: SilverHolding Force: 180kg/396.8lbsInput Voltage: DC 12VOperation Current: 400mASize: Shown as PictureApplication: wooden door, glass door, metal door, fire-proof doorPackage Weight: Approx. 995gPackage list:1 * Electromagnetic Lock1 * Armature Plate 1 * Screws Pack1 * User ManualNote:Please make a note if you need an English manual.