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. The door will be closed when power is on; when power off, the door will open. It is suitable for wooden door, glass door, metal door, fire-proof door, Cabinet, etc. Please check if Z and L brackets are required for installation. Specification: Electromagnetic plate Material: Aluminum Alloy + Metal Plate Armature Plate Material: Zinc Cover Finish: Anodized aluminum Color: Silver Holding Force: 280kg/600lbs Input Voltage: DC 12V Operating Temp: -10 ~ +55C (14-131F) Operation Current: 480mA Size: 9.84L x 1.93W x 0.98H (in)/ 290L x 45W x 25H (mm) Armature plate: 7.09L x 1.50W x 0.43H (in)/ 180L x 38W x 11H (mm) Package Weight: Approx. 4.0lb (1.78KG) Specification of Z and L Bracket: Material: High strength aluminum, sandblast finished Opening Mode: 90 degree door Suitable for Door: Wooden door and metal door Suitable for Lock: Electromagnetic lock series of 280KG/ 600lb holding force Easy to install and convenient to use Package Weight: 0.60KG/ 1.33 pounds Package list: 1 * Electromagnetic Lock 1 * Armature Plate 1 * Screws Pack 1 * User Manual (English) Package List of Z and L Bracket: 2 * "Z" Style Bracket 1 * "L" Style Bracket 1 * Screws Pack