Homeline generator panels are for the manual transfer from utility to generator power. This generator circuit breaker interlock kit is for use on "S" Series NEMA 1 and NEMA 3R Homeline generator load centers. It is used to interlock a QOM1 two pole main circuit breaker of the load center (100A to 125A) with a Homeline two pole (15A to 125A) branch circuit breaker. This interlock kit has a maximum height of 2.36 inches, a maximum width of 2.44 inches and maximum depth of 0.49 inches. This interlock kit is packaged in a clam shell. This interlock kit is UL Listed.