The Hammer was a light car built with a two-cylinder, 12 hp engine in 1905.
This was replaced with a 24 hp, four-cylinder engine for 1906.
The five-seater tonneau weighed 1,800 lb (820 kg), and came with a choice of a planetary or sliding-gear transmission, with a shaft final drive.
The Hammer Motor Company was integrated as part of Hammer-Sommer when they went defunct in 1905.
This article about a brass-era automobile produced between 1905 and 1915 is a stub.