Fender 551 Shape Picks, Tru-Shell, Extra Heavy for electric guitar, acoustic guitar, mandolin, and bass Crafted from organic natural proteins designed to replicate the unique sound of Hawksbill Sea Turtle shell picks without harming animals in any way Extra Heavy gauge picks produce an incredible rich low frequency response with a beautiful bloom to the notes, ideal for bass players or jazz guitarists The 551 pick shape is slightly wider than the 451 with a sharp tip Provides natural lubrication which avoids binding on the string for precision playing Delivers full-voiced bass with crystalline treble tones while providing unparalleled comfort