Features: The knob is made of Iron material, strong and durable. Very suitable for replacement of guitar bass and amp. This is a great tool that can help with guitar replacement. Durable, and with delicate surfaces, smooth and beautiful. Damaged, dirty or old control knobs can be replaced well. Specifications: Material: Iron Color: As The Picture Shows Package Weight: approx.120g Size: approx.1.9x1.9x1.82cm/0.74x0.74x0.71in Note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thanks! Package includes: 4Pcs x Guitar Tone Volume Knobs 1Pc x Wrench