Features: These control knobs push fit onto the 6mm(0.24inch) diameter split shaft of the tone and volume pots on your guitar. No screw hole on the knobs, perfect used for your guitar and control the volume tone. Overall height of the knobs is 18mm(0.71inch) and is 17mm(0.67inch) in diameter. Please be sure to verify the pots diameter of your guitar before you order the item. Material: Made of durable metal material. Cylinder shape with a dome. Black color. Package Includes: 3Pcs guitar knobs. Whether you are jamming in the studio or performing on stages, these knobs provide precise control over your guitars volume and tone. Enhancing the look and functionality of your guitar with these smooth knobs for most electric guitars. Keywords: electric guitar parts, metal knobs, volume control. Specifications: Material: Metal Color: Black Package Weight: approx.40g Size: approx.1.8x1.7cm/0.70x0.67in Inner Hole Diameter: approx.6mm/0.24in (More Size Detail, Please See Photo.) Package Includes: 3Pcs Guitar Volume Tone Control Knobs note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!