This isn't a friendly, nice little edge-of-breakup overdrive, it's a nasty, unhinged metal distortion voiced similarly to old Boss favourites like the MT2 and HM2. It's got a handy parametric mid control and a built in noise gate to tighten things up; both handy. It's gross, but good-gross; like pimple popping videos. 

Model: MXR M116 Fullbore Metal
Made: USA, recent model (serial AB74086)
Type: distortion
Power: standard 9v negative supply or battery (not included)
Switching: true bypass
Equivalent new street price (approx): $189aud
Mods: none
Accessories: original box and manual
Condition notes: used, few minor marks, fully functional. Overall: excellent condition