1/2" duplex fast lock connectors with insulated throat are used to connect flexible metal conduits like metal clad cables or armored cables to electrical junction boxes or enclosures. Garvin Industries’ duplex fast lock connectors snap on 1/2” box knockout openings and do not require locknuts to secure them. They accept multiple cable sizes. Fast lock connectors are made with a versatile combination head screw that can be securely fastened using a slotted, Phillips, or Robertson head screw driver. They are also zinc electroplated for excel¬lent corrosion protection. Special Features: AL MC Interlocking (MCI) 10-3 (0.582) to 8-2 (0.650), Steel RWFMC, AL RWFMC, AL FMC 1/2”, 50 Steel AC 10-4 (0.625) to 6-3 (0.842) 3/4” 25 250, AL AC 10-4 (0.625) to 8-4 (0.770), Steel MC Interlocking (MCI) 10-3 (0.594) to 6-2 (0.746).