Hammer

A hammer is primarily used for smithing, to make items from metal bars on an anvil. Take care not to forget it, as it's most annoying if it was a long walk to the anvil.

It may be bought from a general store for 1 gp, or may be found upstaris at the Falador forge.

Other uses
The hammer is also required in a couple of quests, to aid in the time-houred way of dealing with a vampire, or to hammer some nails in.