The Ubiquiti Fail-Secure Strike Lock is an electric strike lock that connects to a UniFi Access Hub (UA Hub) and ensures full security even during a power failure. Built for strength and longevity, this type of lock remains locked when there is no power, only unlocking when electricity is applied. It is offered in Standard (15mm) and Narrow (8mm) sizes. The Standard strike lock has a holding force of up to 1,200 kg (2,500 lb). The Narrow strike lock has a holding force of up to 227 kg (500 lb) This versatile lock can be installed on an aluminium, steel, or wooden door frame, so you can place it wherever you need to enhance your door security. This 12V DC-powered lock also meets all applicable ANSI safety standards and can be connected to a UA Hub in minutes. Features: Remains locked during power outage Can be installed on an aluminium, steel, or wooden door frame ANSI-compliant design