This breaker was just perfect for splitting a Workshop/Recording Studio circuit from an existing 220 lead. I needed a reliable 30-amp circuit for power tools, and a stable, noise-free 20-amp circuit for my recording studio. The install was quick and straightforward. I had both circuits (including a third, dedicated 20-amp circuit for the workshop lighting) up and running in less than an hour. Be aware, though, that this unit does not come with the steel grommets for feeding in your cables, or a dedicated grounding block.