There are numerous artists known as Hammer:
1. Finnish NSBM band
2. British heavy metal/NWOBHM band
3. Irish House/ Techno DJ and Producer
4. Polish thrash/heavy metal band
5. Argentinian thrash metal band
6. Italian heavy metal band
7. Bay-area groove rock band
8. Japanese hardcore band
9. South Korean nu-metal band
10. British Grime emcee
11. 2 albums ("Black Sheep" & "Hammer") released by Jan Hammer in the late 1970s under the name Hammer.
12. Hammer was also used as a pseudonym by MC Hammer.
13. Uruguayan Rap artist and Battle rapper.
1) Hammer is a national socialist black metal band from Finland. Formed in 2004, the band consists of Ravenum - Drums and Guitars (Horna, Blutschrei) and Verflucht - Bass and Vocals (Alttari)
2) Hammer was a NWOBHM band formed in 1982 under the name Holland. They recorded and released 'Early Warning' as Holland, but were thereafter forced to change their name after being threatened with legal action by a Canadian band bearing the same moniker. After settling with Hammer, they released the LP 'Contract With Hell' in 1985. The lineup consisted of vocalist Marty "The Dog" Wilkinson, guitarists Bob Henman and Kenny Nicholson, bassist Graeme Hutchinson, and drummer Marty Day.
3) Hammer (Rory Hamilton) is a DJ and Producer from Belfast, based in London, UK.
4) Hammer 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. Hammer consisted of Robert Köhler (vocals), Jarosław Kopała (vocals, guitar), Andrzej Szenajch (vocals, guitar), Jacek Osuch (bass), and Tomasz Klimczak (vocals, drums). Hammer broke up in 1993, and has since started playing with new lineup in 2002.
5) Hammer is a thrash metal band from Córdoba, Argentina.