Features:_x000D_ 1.Made of high-grade metal material, wear-resistant, durable for long-lasting use._x000D_ 2.Adopt fine workmanship and delicate design, smooth surface, will not scratching your guitar._x000D_ 3.Lightweight, easy to install and use._x000D_ 4.Perfect used as guitar tone control knobs and volume control knobs._x000D_ 5.Great replacement for electric guitar and bass._x000D_ _x000D_ Specifications:_x000D_ Material: Metal_x000D_ Optional Color: Black, Golden_x000D_ Mounting Hole Inner Diameter: Approx. 6mm/0.24in_x000D_ Size(Diameter*Height): Approx. 18.2*18mm/0.7*0.7in_x000D_ _x000D_ Package list: _x000D_ 4 * Guitar Control Knob 1Made of high-grade metal material, wear-resistant, durable for long-lasting use. 2Adopt fine workmanship and delicate design, smooth surface, will not scratching your guitar. 3Lightweight, easy to install and use. 4Perfect used as guitar tone control knobs and volume control knobs. 5Great replacement for electric guitar and bass.