I use them on bass for disharmonic technical non-melodic pseudoatonal horror/terror death metal. I prefer them slightly softer (they produce aesthetically more interesting harmonics) but they break immediately. I use them with the JAM pedals TubeDreamer guitar pedal. The Dunlop Evh Frankenstein Pick Tin with a thickness of 0.60mm has rough protrusions to prevent slipping. The price is insanely high. A Chinese person could find the right plastic recipe and add roughness to the grip surface. I couldn't find what I wanted from a Chinese brand, so I will buy them again. I recommend them for bass metal players.

Very good pens. Nice color and a sufficiently rough surface on the top so that they do not slip at all. They are not as soft as the typical 0.6mm ones. They are a little harder, almost like 0.8mm, but personally, that suits me.

P.S. The color from the bottom part that touches the strings fades unlike the top part.