I've used a variety of guitar picks over the years and these are by far my favorite - I was given one several years ago and have held on to it for....well...years. They don't break, they barely wear at all, they're slightly flexible so when you get to picking pretty fast, these are perfect. I used to use Gibson and Fender picks - and they're fine, but not as flexible and will break. If you haven't tried these - give em a go and see what you think - I'd bet you really like these - they come in different thicknesses and I've found the 60mm to be my favorite for guitar work.