Plectra is a tool that is used to play stringed instruments such as the guitar, mandolin, or banjo. Synonyms for plectra include guitar picks, flatpicks, fingerpicks, and thumbpicks. Guitar picks are generally made of plastic, while fingerpicks are made of metal and are worn over the fingers to pluck strings. Thumbpicks are similar to fingerpicks, except they are worn on the thumb. Flatpicks can be used on both acoustic and electric guitars and come in a variety of sizes and thicknesses. Having a variety of plectra on hand can help guitarists achieve different tones and styles while playing their instruments.