A Solid Metal Distortion.
The Digitech Metal Master distortion pedal has its bread and butter right in the name: METAL!!! If you want metal tone, look no further.. . However, I reccomend it mostly for experienced shred metalists, as this pedal's tone doesn't do a great job of hiding mistakes, so beware. However, if you're up to the challenge, this is a great and relatively cheap pedal. I highly reccomend it.