Increase home or business security and let visitors in more easily with this electric door strike designed specifically for use on metal doors. Unlike other electric door strikes, which are set for fail-safe (locks when power is applied) or fail-secure (locks when power is removed), the Heavy-Duty Safe/Secure Electric Strike is field-programmable in seconds for fail-safe or fail-secure applications. This electric door strike is powered by a 24V DC power supply (sold separately). A Heavy-Duty Safe/Secure Electric Strike is also available for 12V DC power supply applications. What's Included # 2 metal tabs # Mounting hardware # 4 wire nuts # Electric strike # Template # Instructions Ultra-Secure Electric Door Strike Installs in Any Metal Door The Heavy-Duty Safe/Secure Electric Strike can convert virtually any existing cylindrical lockset to an electronic access controlled locking system, and the device is reversible for right-hand or left-hand doors. Connect the electric door strike to a keypad or to your hardwired security system to allow visitors remote entry. The heavy-gauge stainless steel construction withstands 2000 pounds of force, so by installing this strike, you'll be adding an immeasurable level of security to your home or business.