Needed to replace an old worn out porcelain socket in an old three-way lamp. The local hardware store had one from a brand I had never heard of and it didn't have two wires and they wanted $6. I ordered this Westinghouse, an excellent brand, for 2.98 and with two wires attached. Worked great and was easy to install. I think I'll order a few more to upgrade a few more lights. Due to the high output of 660W max, I don't have to worry about the light bulbs I use in it. I also use new three-way LED