I bought these because I recently got a Macbook Air (2020 model) that has only TB3/USB-C ports. While I normally have a dock that lets me use USB-A accessories, I still wanted something I could use as a backup in case I'm traveling or otherwise don't have the dock handy. These were an attractive price and didn't have terrible reviews, so I took a chance and bought them. So far, they've worked on every device I've tried them with (flash drives, keyboard/mouse receiver, and similar). I have had no problems with them fitting into my ports, devices getting stuck, or other issues that I was worried about from some reviews on this or similar products. Do note, however, that if you have Mac, your ports may be too close to use both on the same side at the same time, but I have only ever needed one at a time, so this is not a problem for me.