Hamer Guitars is an American guitar manufacturer, it was founded by Jol Dantzig and partner Paul Hamer in 1973.[citation needed] It features designs created by Dantzig. Originating in the Chicago area, Hamer is generally considered to be the first “boutique” electric guitar brand, catering to pro musicians only.[citation needed] Hamer was first incorporated in Illinois in 1976. The company was acquired by Kaman Music Corporation in 1988. Hamer offers a wide array of electric guitars and electric basses, and, since its foundation placed an emphasis on producing high-end instruments with vintage aesthetics as well as creative innovations.[citation needed] Hamer markets a semi-pro line of instruments called the “XT Series” and the entry-level brand Slammer by Hamer.