2 pack, 1/2", non-metallic snaptite connector, indoors only, snap in, fits non-metallic cable #14/2, #12/2, #12/3, awg or 2 #14/2 awg or flex cord .300 to .560" diameter 3/8", 1/2' knock out, in a dry location, use to connect non-metallic sheathed cable to a steel outlet box or other metal enclosure, 3/8" size fits 1/2" knock out , snap in design allows for quick & easy installation, no locknut required.