Grinder was a late 80's/early 90's speed metal/thrash metal band from Germany. They released three full length albums and one EP before disbanding. Grinder were the first international heavy metal act to play in Turkey, on May 12, 1990 at the Open Air Theater in Istanbul.
Adrian Hahn - vocals (plus bass on 1st 3 albums),
Andy - lead guitar,
Lario - rhythm guitar,
Andi - bass,
Stefan Arnold - drums (played in Grave Digger afterwards)