I bought these to replace the stock knobs on a HB CST-24T.
I am a big fan of Schaller stuff - I had previously bought their locking tuners, which are excellent.
They feel nice and are visually stunning but in terms of feel, around the "hole" (where it screws onto the shaft) is a little rough to the touch. Not sharp, just rough. I do feel like it could have been finished a bit better.
Again, this is a really minor flaw that could probably be fixed with a gentle filing.