The T-Rex Engineering DGTM Diabolical Gristle Tone Manipulator is not your typical overdrive pedal. Inspired by the savage auditory pummeling of Greg Koch, the T-Rex DGTM brings forth a distinctive overdrive to satisfy many an overdrive connoisseur's palate. From vintage crunch to modern "tweak," the devilish T-Rex DGTM oedak has it all.