The Walrus Audio Iron Horse is a three-knob distortion pedal that aims to produce classic distortion sounds with room to shape your own sound. Armed with a three-way diode selector, the Iron Horse's no-frills design lets you switch over from a mid-heavy riff tone to an aggressive lead without losing a note. Representing the higher-gain tier of Walrus Audio overdrives, this has the muscle and versatility to seamlessly blend into any metal rig.