The DIAO79NI 4-String Bass Brass Guitar Nut is a precision-engineered replacement part designed for electric bass guitars. Crafted from high-quality brass, it features durable construction with dimensions of 38mm (1.50 inches) length × 5.8mm (0.23 inches) thickness × 7mm (0.28 inches) height—refer to the size chart for detailed measurements. This nut includes pre-cut grooves for strings 1-4, and its height is adjustable via screws using the included hex wrench, ensuring optimal setup for improved playability. It enhances instrument resonance and sustain, boosts tuning stability, and allows strings to glide smoothly for reduced friction and extended lifespan. Each package contains 1 brass nut, 1 base plate, and 1 hex wrench. Note: Multiple similar products are available; please verify parameters before ordering to guarantee a perfect fit.