Cannon cogs are used when repairing dwarf multicannons within the Artisans Workshop. To make them, you should repair broken cannon cogs on an anvil, or make new ones in a furnace with a steel ingot II and a Cog mould in your inventory. Ten of these cogs need to be added to an empty cannon base in order to repair it, making a Cannon base.
This item can be taken outside of the repair area, but cannot be banked.
