Features: 1.Easy Adjustment: This string knob allows for easier adjustment on the tone, volume, potentiometer, etc. to meet your needs. 2.Practical Using: Enables wide application on a variety of guitars, electric guitars, bass guitars and so on, very useful. 3.Good Decoration: Simple in style but pretty in colour, the control knob is also a beautiful decoration for your instrument. 4.3Pcs in the Set: With 3pcs controller knob in the set, which largely simplifies the replacement of old and damaged parts. 5.Attached Wrench: Comes with a light weight and a compact size, the installation is very convenient with the wrench attached. specification:Item Type: Electric Guitar Knob PackageList:3 x Electric Guitar Knob 1 x Wrench