Ernie Ball nickel wound Not Even Slinky drop tuning electric guitar strings give you optimal string gauges for drop D and drop C tuning. The nickel-plated steel strings produce a balanced tone with your electric guitar. You'll get clear low tones and defined highs to shape your signature sound. The Not Even Slinky set has been crafted to withstand lower tunings so you can experiment with different tunings without sacrificing tone or playability. Once you try the strings, you'll hear why metal musicians worldwide choose them to achieve their ideal drop-tuned tone. This is a 2-pack.