The Pirastro Perpetual double bass strings were mainly developed for pizzicato playing to provide the player with a comfortable left-hand feel, fast articulate response and strong energetic tone. Using a new uniquely designed extremely flexible steel rope core, the Perpetual double bass strings provide incredible stability and tremendous power. With a little adjustment on the players end, the sound can be manipulated to suit a wide variety of styles. A powerful and focused low end gives way to a full, sophisticated upper register. When played arco, the Perpetual bass strings have a clear yet complex tone with an intense power that can be felt by the musician as well as the listener. With their effortless left hand feel and an astonishingly quick bow response, the Perpetual bass strings allow the player to practice for long periods of time with little fatigue.