by grant5
davypi wrote:
There are two buildings (Clay Mound and Coilery I think) that give you a production bonus if you own a building with a hammer.
Yep, I think this is the only thing hammers are used for, although there could be special buildings that reference them.
The Clay Mound gives one extra clay per hammer you own, while the Colliery gives max 1 extra coal if you own at least one hammer.