I bought them to "clean" the holes I had to drill in my walls to run a very long HDMI cable. They work very well and are definitely a bargain in my opinion. You get durable, high-quality end caps at a very good price. My only "complaint" is that the hole size is slightly smaller. The customs hole let the cork loose. This was easy to secure with a silicone bead around the hole and then insert a plug. I really like the detachable center piece. A previous reviewer stated that it's not removable, but that's incorrect. This is a very tight fit that requires little effort to pop out. However, I like that it can't pop out so easily.