This prototype interlock kit fits Square D  Homeline panels with a single vertical throw main and approx 2 - 2 1/4" spacing from main breaker to generator breaker. The Gen breaker will be on the top of the left stack of breakers.
 
This is not a production kit yet so it will not be our signature blue anodized color. However, it is CNC machined from solid billet aluminum and looks and functions very nicely.
 
As always the kit is made in USA and includes everything necessary to install the interlock including thread lock compound, all hardware, decals, a correct size drill bit and clear installation instructions.
 
Thank you for your business and for buying USA!