DR Strings Dragon Skin+ Coated Accurate Core Technology 5-string Quantum nickel bass strings provide a full, balanced tone with outstanding projection. Accurate Core Technology creates grooves on the core to cradle the wrap wire, allowing the strings to ring out with clarity and sustain. A micro-thin coating provides a smooth feel while protecting the wrap wire. These nickel-plated bass strings are designed for the discerning bassist looking to achieve a clear, punchy tone with string-to-string balance. With Accurate Core Technology, you'll experience strings that are exceptionally musical, loud and balanced. The difference in tone and feel is immediately apparent.