... *2Suitable for: Wooden door, Glass door, Metal door, fireproof doorFinishes for Shell: Anodized aluminum & surface texture processing;Finishes for Magnetic: Zinc;Finishes for ... current 3AAdvantage:Easy to install, no frame door can choose bracket to use;With dual voltage of 12V&24V,which can ... change within 3 months because of product quality itself 180kgs double door magnetic lock with signal output