Blacksmiths' Blocks is a term used to describe the tools of the trade for a blacksmith. It consists of anvils, which are large, heavy blocks of metal used to shape and form hot metals, and hammers, which are used to strike the anvils and shape the metal. Anvils are typically made of cast iron or steel and have a flat top surface and a horn-shaped projection at one end. They are essential tools for any blacksmith and are used to shape and form hot metals into various shapes and sizes.