We actually had a discussion with a reel developer from a Japanese fishing tackle manufacturer.
The material used for the drag is not only metal (non-ferrous metal), and it can be touched in several notches, including the rate of star drag, but when the drag is applied when interacting with a large fish, the line is fed out smoothly, instead of rattling intermittently. When the drag is applied, the line is fed out smoothly. Our employees have proven this with many of our reels.