The PRS Classic Heavy Guitar Strings offer maximum flexibility and durability, allowing guitarists of all styles to confidently strum, bend, and pick. With over 30 years of use on PRS guitars, these reliable strings have a high-carbon steel core that ensures vibrant tone for long-lasting play. Coiled in pairs – 1st & 4th, 2nd & 5th, 3rd & 6th – and nickel-plated with hex-shaped cores, the PRS Classic Heavy Guitar Strings bring reliable performance to every performance.