Set of 2 Erhu Fine Tuners Even if you can tune the instrument, making fine adjustments can be difficult. By using these adjusters, you can make subtle pitch adjustments! Simply turning the screw allows you to easily fine-tune the tension of the strings! Enjoy playing the erhu even more♪ ● Convenient for erhus with wooden tuning pegs ● Attach one to the outer string and one to the inner string Thank you for viewing.