Electro Harmonix Little Big Muff.
In a slightly smaller package than usual, you get a soft and flexible sustain and a silky overdrive with a tone that lies somewhere between the Russian and the American variant.
Same silky smooth violin-like sustain and creamy tone that made the legendary 1970 Big Muff Pi famous. This little brother displays his heritage proudly. Same circuitry in a compact die-cast box.