Hämmer Was A Polish Oldschool Thrash/heavy Metal Band Founded In 1985. They Released Four Albums Two In Polish Two In English And One Split With Destroyer Band. Hammer Consisted Of Robert Köhler Vocal Jarosław Kopała Vocal Guitar Andrzej Szenajch Vocal Guitar Jacek Osuch Bass And Tomasz Klimczak Vocal Drums . Hammer Stopped Playing In 1993 And Started With New Staff In 2002.