The Grimalkin is a hybrid op-amp/transistor octave multi fuzz pedal featuring a three-way gain control and a voltage control for the transistor stage. Its controls allow for a variety of tones, including thick riff-worthy tones and classic overdrive fuzz. The pedal also includes sub and high octave options and a volume control. Hand-wired and built with true bypass switching, it comes in an acid-etched rugged enclosure.