1、COMFORTABLE GRIP: These guitar knob handles can provide comfortable grip, improve performance stability and control, compact and practical. 2、EASY INSTALLATION: Just insert the button handles into the electric guitar string, easy install and replace, suitable for electric or acoustic guitar. 3、MAIN FUNCTION: These guitar tuner buttons can help secure the strings, prevent them from slipping or falling off, and provide a stable sound quality. 4、PLASTIC MATERIAL: These tuner button heads are made of excellent plastic, wear resistance, corrosion resistance, which is lightweight and durable. 5、OTHER ACCESSORIES: Includes 6pcs guitar tuner machine heads, equipped with screws and gaskets for easy installation, with strong practicality. Item Type: Guitar Tuning Button Material: Plastic 6 x Tuning Buttons 6 x Screws 12 x Gaskets