Product review (4 stars): aftermarket mirrors fit great, look great and function well.
I installed on my JD gator and they fit great, look great and function well.  They do move a little easier than I'd like but only when bumped or hit so as not to damage them and I don't want to over-tighten them.  No issues at all, I believe they could be used on anything needing mirrors.  I would get them again.