Keeley STAHLHAMMER Distortion is a hard hitting distortion. For cranked British amp sounds, this pedal delivers. Keeley has combined classic high gain amp sounds and added a tube amp style EQ to give you a wealth of tones. This unique structure has two modes of distortion – High Gain/Tube Saturation switchable from the right side of the pedal. The three tone controls, Bass – Middle – Treble, give you a fantastic range of amp sounds that you will be both familiar with and find easy to dial in.