A
guitar pick (American English) is a
plectrum used for
guitars. Picks are generally made of one uniform material—such as some kind of
plastic (
nylon,
Delrin,
celluloid),
rubber,
felt,
tortoiseshell,
wood,
metal,
glass,
tagua, or
stone. They are often shaped in an acute isosceles
triangle with the two equal corners rounded and the third corner less rounded. They are used to strum
chords or to sound individual notes on a guitar.