With these tuning pegs, you can quickly and accurately adjust the guitar strings. These tuning pegs can hold strings tightly, allowing the guitar to stay in tune to improve playing enjoyment.Locking the tuner prevents the gear from being exposed to the air and reduces rust, making it more durable.High quality zinc alloy material, equipped with screws, bushings and ferrules for easy installation and remove, tuned guitar strings are not easily loosened, durable for long use time. Great replacement for the old, broken tuning pegs.Precision 1:18 gear ratio provides smooth, exact tuning, while virtually eliminating backlash and slippage.Set of 6pcs quality chrome locking for steel string (electric or acoustic) guitars (3 left 3 right). These guitar tuning pegs is for modern 3/8"(10mm) tuner holes guitar with 45 degree fixing tag.