1-1/4" Clamp Type Connectors, Twin Screw Die Cast Zinc, 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.