1、Applicable Guitars: This knob is only applicable to guitar or bass with American 24 spline split shaft basin check the type for better fit! 2、Easy to Install: Comes with a compact size and a light weight as well the easy installation can be quickly completed. 3、Ideal Replacement: This knob can be easily installed making it an ideal replacement for the old and damaged parts. 4、4Pcs: There are 4 pieces knobs in the package enough amount for you to make replacements or use choose it with confidence! 5、Plastic Material: Using excellent plastic material the knob possesses impact resistance scratch resistance environmentally friendly.