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. Features: Use magnetic power to lock the door, 180kg(396.8lbs) holding force. Made of high-strength aluminum alloy material with hard anodized processing, heat dissipation 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-proof material manufacturing. High quality electromagnetic material vacuum treatment, double lock body insulation treatment. Specification: Condition: 100% Brand New Material: Aluminium Alloy + Metal Plate Color: Silver Holding Force: 180kg/396.8lbs Input Voltage: DC 12V Operation Current: 350mA Size: Shown as Picture Application: wooden door, glass door, metal door, fire-proof door Package Weight: Approx. 995g Package list: 1 * Electromagnetic Lock 1 * Armature Plate 1 * Screws Pack 1 * User Manual Note: Please make a note if you need an English manual.