A single module circuit breaker housing includes a first circuit breaker, wherein the first circuit breaker includes a first shaft assembly and a first contact mechanism coupled to the first shaft assembly, a second circuit breaker, wherein the second circuit breaker includes a second shaft assembly and a second contact mechanism coupled to the second shaft assembly, a first linkage coupled to the first shaft assembly and the second contact mechanism, and a second linkage coupled to the second shaft assembly and the first contact mechanism.