D'Andrea's 358 "Small Teardrop" Formula Delrex Guitar Picks provide gamers with an alternative material that addresses the problem of choose slippage Each pick is made with the ever-popular delrin/acetal materials and is punctiliously designed and manufactured for optimum memory and minimal put on that made the unique tortoise shell noted With a distinct tone and articulation along with a matte finish, the Formula Delrex Picks are a favored preference for all kinds of guitar gambling Proudly Made in USA!