1-1/2", Die Cast Zinc Twin Screw Clamp Type Connectors, Use To Terminate Type Nm Cable To A Knockout In A Dry Location Box Or Enclosure, Fits Service Entrance Cable: 10-2, 8-2, 6-2, 4-2 Non-Metallic Cable: 8-3, 6-3, 4-3, 2-3, Meets UL Canadian/US Requirements.