Musiclily Metal 6mm Knurling shaft Dome Control Knobs for Electric Guitar or Bass, Golden (Pack of 4) Heavy knurl knobs, ideal for Tele,LP,EPI,ST,SQ Style Guitar Fits for 1/4 inch (6mm) diameter shaft of domestic potentiometer and metric potentiometer Material: Metal Alloy ; Color: Gold No screw hole on the knob Package include: 4 pcs Knobs