Our solenoid bolts are of the highest quality, they are very robust and extremely durable. With door close time delay function, will lock until the door completely stop moving, effectively protect the door and lock from damage. It is suitable for wooden door, glass door, metal door, fireproof door, etc. Why not have a look? Features: With door close time delay function, will lock until the door completely stop moving, effectively protect the door and lock from damage. Superior low temperature design, safe and durable. The new structure optimization design, more stable and more secure. Ultra-low-power design, more durable and more environmentally friendly. 500,000 times Power locks durability. Made from high-strength aluminum lock body, stainless steel bolt. Operating Modes : NC (close when powered) Fail Safe. Suitable for wooden door, glass door, metal door, fireproof door, etc. Comes with fixing screws and all parts needed to fit as standard application. Specification: Item Type: Electric Deadbolt Drop Bolt Lock Material: Plastic Color: Silver Operating Mode: NC Fail Safe (close when powered) Feature: Low temperature Voltage: DC 7V -18V Instantaneous current: 850mA Working current: 85mA Time : 0 / 3 / 6 second Item Size: 20 * 3.5 * 4cm/7.87 * 1.37 * 1.57inch Package Weight: 509g/17.95oz Package List: 1 * Electric mortise lock 1 * Instruction manual 1 * Installation size sticker 1 * Package of screw 1 * Ordinary fixed board 1 * Magnetic fixing plate .