Maxim Sergeyevich Martsinkevich (Russian: Макси́м Серге́евич Марцинке́вич, 8 May 1984 – 16 September 2020), better known as Tesak (Russian for Cleaver, Hatchet, Hand Axe, Machete), was a Russian neo-Nazi activist, media personality, vlogger, and the leader and co-founder of the Restruct movement which manifested in post-Soviet countries.