The term 'piercing tool' can refer to two different tools: an AWL and a bradawl. An AWL is a pointed tool used for marking, scoring, or piercing materials such as wood or leather. It typically has a handle and a metal shaft with a sharp point at the end. A bradawl is similar to an AWL, but it has a cross-shaped tip instead of a pointed one. It is used for making small holes in wood, plastic, or other materials. Both tools are used for creating precise holes in materials for various purposes.