Arlington NM94-25 Black Button Push-In NM Cable Connector, 3/8 Trade Size, Fits 1/2-Inch Knock Outs, Black, 25-Pack 3/8 Trade Size, Fits 1/2-Inch Knock Outs Lowest cost NM cable connectors on the market and offer the fastest installation Disconnect electrical power, insert connector into knockout, push cable in to desired length Connectors offer easy smooth cable insertion for single or multiple cables and a secure hold Better cable connectors for one or two cables that install easy, exceeds UL pullout tests Trade Size 3/8, snaps into -inch knock-out to protect cables from rough metal KO edges Offers the fastest method for installing single or multiple cables Disconnect electrical power, insert connector into knockout, push cable in to desired length Meets UL listing and CSA requirements for single or multiple cables Arlington Industries Innovates to make work easy