Halex 75105B Hit Lock Non Metallic Cable Connectors Nylon (100 Piece), 3/8" 3/8-inch's long (1/2-inch's long knockout) Fits NM cable: #14/2, #14/3, #12/2, #12/3, #10/2, #10/2 Snap-in style-no screws or locknuts required, design allows for quick and easy two step installation, push into box and insert cable To UL and CSA requirements 100 Pieces per box