This screw is much heavier and sturdier than any standard one. Plus it looks very interesting, just enough not to look too weird and out of place (at least on a new lacquered sax).
As for the change of sound or the feeling while playing - it's really hard to say. If you want the change in sound you should get another mouthpiece or reed. As for me, this screw is just heavier and sturdier than a standard one, and of course - has interesting look.
Btw, I was afraid the edges might be too sharp. They are not at all.
P.S. Thomann forgot to put this screw in my initial order and made me quite nervous about it. However, kudos to them to ship another one immediately, and mentioning this in the docs so I didn't have to pay taxes twice.