The Pro Co Rat is a distortion pedal that was first released in 1978. It has been used by many guitarists over the years, and is especially popular in the hard rock and metal genres. While the Rat is technically a distortion pedal, it can produce a wide range of sounds depending on how it is used. Some guitarists use it as a fuzz pedal, while others use it to create a more saturated sound. No matter how you use it, the Pro Co Rat is a versatile pedal that can help you create some truly unique sounds.