The Blue Sea 4100-BSS A-Series Circuit Breaker Toggle Guard combines overcurrent protection with manual circuit control in marine and mobile electrical systems.Can be used on any brand of circuit breaker panel using standard toggle type circuit breakers; Fits all A-Series single pole circuit breakers.Product Information Manufacturer Part Number 4100-BSS Key Features Can be used on any brand of circuit breaker panel using standard toggle type circuit breakers Fits all A-Series single pole circuit breakers Fits all panel switches Protects circuit breakers from being accidentally switched ON or OFF Uses circuit breaker mounting screw hole IncludedIncludes 2 mounting screwsImportant InformationWARNING: 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.