QO and QOB one, two and three pole thermal magnetic circuit breakers provide overcurrent protection and switching on ac and dc systems. These circuit breakers have an over center, trip free toggle mechanism with quick make, quick break action and positive handle indication. They also have VisiTrip trip indication, which provides a visual indication that the circuit breaker has tripped and interrupted the circuit. This attachment is for padlocking 2P and 3P QO circuit breakers in OFF position only, fixed attachment. A full line of factory installed accessories, such as shunt trips, auxiliary switches and alarm switches, is also available.