These bracket mounted operating mechanisms are for use with Square D circuit breakers. This circuit breaker operating mechanisms is supplied with an external operating handle assembled to a bracket. This operating mechanism is for 2 or 3 pole KAL or KHL circuit breakers with a 250A frame size. Circuit breaker must be ordered separately. A 9422A1 Operating handle is used with this mechanism. This operating mechanism can be used with Class 9423 door closing mechanisms. Operating mechanism is UL Component Recognized and CSA certified.