Which tool is NOT primarily considered a sculpting tool?

The screwdriver is the tool that is not primarily considered a sculpting tool because its primary function is to drive screws into materials, such as wood or metal, rather than shaping or carving materials like stone or clay, which is the focus of sculpting.

In contrast, a mallet is commonly used in sculpting to strike a chisel or other tools, allowing artists to carve into their materials. The pitching tool is designed for shaping and refining the surfaces of stones or metals, which directly relates to the sculpting process. The chisel is one of the fundamental sculpting tools used by artists to carve and shape their materials, making it essential in the creation of sculptures. Thus, while all the other tools are integral to the sculpting process, the screwdriver stands apart as it serves a distinctly different purpose.