'Delrin' picks take quite some getting used to for anybody familiar with the matte Tortex 1.14s, but once comfortable these are wonderful. With a crisp attack followed resoundingly through by the thickness, they are surprisingly suitable for jazz on an acoustic archtop as well as intricate work up-the-neck on an electric. However, I'm not as much a fan of these for bass playing as of the aforementioned matte Tortex picks. More useable for chord melody on the mandolin than a lot of what Dunlop has to offer, though, and I may well purchase some slimmer 'Delrin' picks for just that purpose... Delicious colour on these, in any case.