5 or 10 Black Outlet Covers -Duplex Receptacle Wall Plates, 1-Gang Standard Size

You can just simply turn off the power, and use screwdriver to take off the old outlet cover plate Firstly, and then replace the duplex wall plate with the new one, and tighten the screw. Durable Material: These outlet covers wall plates are made of poly-carbonate (PC) thermoplastic material for maximum resistance to hard impact and abrasion.