FUGEST 600lbs Electromagnetic Lock Holding Force for Access Control Single Door 12V Use magnetic power to lock the door, 280kgs (600lbs) holding force. Built-in reverse current protection device (MOV). Alluminum shell adopts high strength material, with hard anodised processing. Corrosion resistant. Good quality and durable to use. Fit for wooden door, metal door, glass door, fireproof door, etc. Alluminum shell adopts high strength material, with hard anodised processing.