Square D by Schneider Electric HOM4RK2LA Homeline Right Side Main Breaker Retaining Kit for Back-fed Mains on QOM2 Load Centers This retaining kit secures a circuit breaker to a load center interior when used as a back-fed main Retain one 2-pole, 10 to125 Ampere Home line circuit breaker, to allow lower amperage mains ratings on single-phase convertible main load centers Provides a wider range of options for lower ampacity main breakers UL Listed Accessory Kit