For some reason I thought these picks were going to be flexible. They are not at all, kinda like glass. That being said, I love these picks for Bass. No harsh sound that a regular pick makes with bass. Sounds very much like a finger. Super easy to grip & hold on to. I got 6 purple picks, maybe those are the color of the 3.0's. They sounded horrible on acoustic guitar but very good on electric guitar & electric bass. Nice sharp edges for such a thick pick. They turned out to be much better than I expected. Quality & great price!!