The Electro-Harmonix Nano Metal Muff is a compact, pedalboard-friendly distortion pedal designed for heavy metal guitarists. It features a 3-band EQ for precise tone shaping, a noise gate to eliminate unwanted noise, and a high-gain design. This pedal offers a range of tones, from subtle to aggressive, making it a versatile addition to any guitarist's setup. It is a smaller version of the Big Muff Pi series.