This lock offers fail-secure operation, so when power is lost, the strike locks the door The No-Cut Electric Door Strike (Fail-Secure) is used to convert a cylindrical lockset into an electronic access-controlled locking system This "no-cut" model is specially designed to fit most metal or wooden doors with only minimal cutting required of the door frame beyond the hole for the strike Provides 1,000-pound holding force/static strength It's a solenoid with one function, can be wired any way. Uses 2-contacts, non-polarized connection to access control or egress device, Manufacturer: DRAUXI