Stringed Instrument Accessories - Brand Generic - Set of 4 Bronze Flat Top Guitar Knobs Volume Tone Control Knobs with Tuning Key Highlights Brand Generic Set of 4 Bronze Flat Top Guitar Knobs Tone Control Knobs Knobs with Tuning Key Description: Aluminum alloy knobs are for PA equipment or rotary potentiometer, knobs have a knurled finish around their circumference. These buttons do not have a plastic insert; they are CNC machined from a single piece of solid aluminum, with a durable anodized surface finish. Material: aluminum alloyColor: bronze color Overall size: 20 x 19mm/0.79""x 0.75""(d*h); inner hole diameter: 6mm / 0.24"" High quality knobs with fine workmanship Free allen key is included Package includes: 4 guitar control knobs 1 piece wrench Note: The color may be slightly different due to the color calibration of each individual monitor. Please allow slight measurement deviation due to manual measurement.