Oheisvasara was a hardcore punk band based in Helsinki, Finland. They were active from 1993 to 2001. The band had a lot of lineups over the years, with vocalist Une Helo (also credited as Unebomber) and guitarist Janne Perttilä (also credited as PJ Aamonhammer) being the only ones finally remaining from the original lineup. Original drummer Toni was kicked out because of his ultra-right wing opinions. He was subsequently replaced by Jere Suvanto.