I am both a guitar and bass player. I use fairly heavy strings on both instruments and most of what I play is rock/metal/punk based. I previously used the standard sized 0.88mm Dunlops and was finding that I wore them down too easily and quickly. I would also regularly drop them. These picks are the same on all three sides and have a greater surface area for better grip. Although they are just as durable as the standard 0.88mm Dunlops, I can rotate them when they wear down too much. Overall, I would say the durability is ok if you are an aggressive player or hit quite hard.