Product review (5 stars): Cheap and functional, but notice hole is larger than typical 1/4" shaft
Cheap and functional--I used them to replace the knobs on our kitchen range hood.  The holes are too big for most American appliance shafts which are 1/4", but I just wrapped a few turns of masking tape on the shafts and stuck the knobs on them.  Those who complained about the holes being too big just did not understand how to read the specifications that are given!  When the spec says hole diameter is 0.3", that is larger than 0.25"