This generator breaker interlock kit fits 100A Milbank panels as pictured which have a vertical-throw main breaker and one full space between the main breaker and the two pole generator breaker (so that both buses can be reached by the generator breaker).
 
Everything required to install the interlock is provided including all hardware, a correct size drill bit, a tube of name brand thread lock compound, a full decal set, and installation instructions. All of our interlock kits are proudly made in the USA!