|You will make a cold chisel. |
This is an important tool used for cutting cold metal. Unlike hot chisels which have thin blades, cold chisels are stronger and more robust. The blades are thicker and taper quickly into the shaft because a cold chisel needs more force.
Since more control can be exercised when the metal is cold, the cold chisel is also sometimes used to mark the metal before cutting with a hot chisel or sett. The marked surface is visible when the metal is withdrawn from the fire for cutting.