Fender 351 Shape Classic Picks, Heavy, Tortoise Shell, 12 Guitar Picks, Fender 1980351900.Celluloid is the premier pick material. Celluloid picks give the traditional feel, with a smooth striking surface and a warm, round musical tone. Often called the Fender pick, the 351 shape is the pick most associated with Fender. A wider body and a rounded tip have made this pick a favourite with players of every style.