Use to interlock the QOM1 or QOM2 main breaker with a 2-pole breaker back fed from a generator * For use on indoor QO 150A - 225A Main Breaker Load Centers * Choose where you want to direct generator power to any circuit within the home * Does not require a separate generator panel * Includes an interlock bracket, retaining bracket, 1-hole drilling template, 3 hex nuts, (3) 10 - 32 shoulder screws and (1) interior mounting screw