Often called a pick or plec, a plectrum is a small flat tool used to pluck or strum a stringed instrument. For guitars and similar instruments, the plectrum is a separate tool held in the player's hand. In harpsichords, the plectra are attached to the harpsichord's jack mechanism. Plectrum for Guitars and Similar Instruments A plectrum for guitars is typically a narrow, isosceles triangle with rounded corners; the most acute angle is the one used to pluck the string. A plectrum can also be cal… (More on Plectrum)