Tough Rod

The Tough Rod is an item added by Tinkers' Construct which is used in advanced tools and weaponry. It costs 3 of a material to create. For example, if you were to make an Iron Tool Rod, then it would require a Smeltery, a Tough Rod Cast, and 3 ingots worth of Molten Iron.

Usage
Tough Rods are used to make the following tools and weaponry, most of which require a Tool Forge to be created: Hammers, Lumber Axes, Excavators, Scythes, Cleavers, Battleaxes, and Javelins. Javelins are the only weapon that can be crafted without a tool forge.