The term 'Rock Instruments' can refer to a variety of instruments, but the most common are guitars. Guitars are stringed instruments that have been used in rock music since the 1950s. They typically have six strings and are played by strumming or plucking the strings with the fingers or a pick. Electric guitars are amplified with an amplifier and speaker, while acoustic guitars are not. Guitars are one of the most popular instruments in rock music and are used in many genres, from classic rock to metal.