The unique protruding structure on the center of the band adds distinctiveness to this ring style which you won't get with other wider bands. Moreover, it gives an illusion of a more modern and classic style, when in reality this ring style has been around for decades; the first one was designed back in 1800 by Tiffany & Co. read more - https://jangmidiamonds.blogspot.com/2022/08/a-brief-guide-on-knife-edge-engagement.html