Fills opening in covers if twistout is removed in errorQOFPCP are used only in QO load centers, filling the spaces where no circuit is attachedCHOMFPCP are for use only in Homeline load centersUL Listed and ANSI CertifiedFills opening in covers if twistout is removed in error. QOFPCP are used only in QO load centers, filling the spaces where no circuit is attached. CHOMFPCP are for use only in Homeline load centers. UL Listed and ANSI Certified.