
They don't feel like "high quality silicone" or "soft". They are hard, inflexible plastic. And they are not easy to install on my 21mm Tesla nuts. If I were to use them (which I don't) I would probably have to tap them with a small hammer and to remove them they would probably have to be cut off (the extractor that came with them probably wouldn't be able to remove them). They would be much more than a "tight fit" on my nuts. Ring nuts may vary by make and model of vehicle. They may fit other cars, but they don't fit my car.