Performance Engineered For Ultimate Playability Made from Magnesium, the lightest structural metal on earth, 5x lighter than brass, 75% lighter than steel and 33% lighter than glass, the MagSlide produces a rich, warm tone with great sustain and minimal string noise on acoustic or electric guitars. Comfort And Tome MagSlides "Comfort Grooves" provide more control and allows airflow between your finger and the inside wall of the slide. The inherent dampening characteristic of magnesium contributes to the MagSlides warm tone and remarkable amount of sustain. Lighter Than Glass Magnesium is the lightest structural metal on earth and is 33% lighter than glass for ultimate playability. Because the MagSlide is so lightweight it can be played on both acoustic and electric guitars with lighter guage strings with lower action. Why Magnesium? Guitar slides are traditionally made from steel, brass, glass or ceramic, each which have their own benefits and unique characteristics. Magnesium combines the best qualities of these traditional materials in one fully engineered tapered slide