Electric Drop Bolt Lock NO Mode Fail Security DC 12V Electronic Bolt Door Lock for Access Control System with Time Delay Fail-Security Mode Color:Fail-Security Mode Mandrel Stem Included: Each kit

Mandrel Stem Included: Each kit comes with a mandrel stem

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Electric Drop Bolt Lock NO Mode Fail Security DC 12V Electronic Bolt Door Lock for Access Control System with Time Delay Fail-Security Mode Color:Fail-Security Mode Mandrel Stem Included: Each kitElectric Drop Bolt Lock NO Mode Fail Security DC 12V Electronic Bolt Door Lock for Access Control System with Time Delay Product Features This Electric Drop Bolt Lock can be easily used in Door Access Control System. NO Mode: Fail security mode. The lock is locked default. It will be unlocked only after power on and you press the push button or remote controller. This Electronic Bolt Door Lock has time delay function, and the delay time can be set to