Which tool is primarily used for cutting hair?

Shears are primarily used for cutting hair because they are specifically designed for precision and versatility in hair cutting techniques. They typically have a sharp edge that allows for clean cuts and can be used for various styles, including straight cuts, layering, and texturizing. Shears come in different sizes and blade types to accommodate various hair types and cutting techniques, making them an essential tool for barbers and hairstylists.

In contrast, a comb is mainly used for styling and sectioning hair rather than cutting it. A brush is used to detangle and smooth hair, not for cutting purposes. Clippers, while also used in hair cutting, serve a different function, primarily for creating short hairstyles or buzz cuts with a uniform length. They have guards that control the length of hair being cut, but they do not offer the same level of precision that shears provide for detailed work.