It may be one of the best picks on the market. Ideal for rock/metal/blues situations where precision is the goal, not big chords. With a thickness of 1.38mm, they are ideal, but their small size takes some time to get used to, especially if you come from larger classical picks. Perfect for fast riffing and pinch harmonics. As for their material, besides the fact that the carbon attracts attention, it is also extremely durable.