I bought them because I also bought a Fender pearloid pickguard and my stock knobs did not fit the same colour the new pickguard had. I spent a lot of time looking for some chinese fakes until I decided to bought the original ones and hope that all fender products would have the same colour, and in fact they do!
Overall I'm very satisfied with my purchase and I use them now on my mexican Strat, although they would fit any other as the knobs are almost universally interchangeable.