Features: Skull head design with red eyes, punk style making you cool. Protecting your tuning knobs, which is also a good decorations. Excellent workmanship, plated and has wonderful appearance. If your knobs are dirty, dingy and old, these knobs will work great. A volume tone control gadget that guitarists likes, it can serve as a gift. Specifications: Material: Plastic Color: Golden/Silver/Black Package Weight: approx.90g Size: approx.2.5x1.9x2cm/0.98x0.74x0.78in Inner Hole Diameter: approx.6mm/0.24in Hex Wrench Diameter: approx.2mm/0.08in (More Size Detail, Please See Photo.) Package Includes: 3Pcs Guitar Volume Tone Control Knobs note: Please allow 1-3mm 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!