If your knobs are dirty, dingy and old, or just want to dress up your guitar. These will work great. With skull head design and , they will make your guitar more special and cool. They are compatible with most of electric guitars, and wrenches are included, it is easy to install and remove. Features - Color: Black. - Size: 2.40X2.00X2.00cm/0.94X0.79X0.79in - Material: Metal. - If your knobs are dirty, dingy and old, or just want to dress up your guitar. These will work great. - Unique Design: With skull head design and , they will make your guitar more special and cool. - Easy to Use: They are compatible with most of electric guitars, and wrenches are included, it is easy to install and remove. - Made from metal, these knobs are solid, wear resistant, and the service life is ideal. - The adjustable fit means it will fit either coarse or fine knurled knobs. Package list: 4 x control knobs 1 x wrench