4125 AC A-Series Circuit Breaker Lockout SlideFeatures:Allows only 1 double pole AC circuit breaker to be activated at a timeGuarantees that AC power from 2 sources (shore power and genset or inverter) will not be mixedFits all World or A-Series and Rocker double pole circuit breakersUses circuit breaker mounting screw holes. Requires no special panel modificationIncludes mounting screwsWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.