I needed to replace a faulty circuit breaker that was stuck in the mechanism due to dust. Bought and gave to my electrician who replaced it in 2 minutes. Works perfectly. Your electrician can tell you they can get a replacement and it will cost over $100. I don't know what brand it will be but they are new and work great. Designed as a replacement. The switch doesn't come in retail packaging, but that doesn't matter. Amzaon glued the screws to the device when I read there were complaints about missing screws.