What tool is primarily used for blending hair in men's haircuts?

The tool primarily used for blending hair in men's haircuts is thinning shears. Thinning shears are designed with one blade that has teeth, allowing them to remove bulk from the hair without significantly changing the length. This makes them particularly useful for achieving softer lines and a more natural transition between different lengths, especially in areas like the sides and back where hair might need to be tapered or blended seamlessly into other sections.

Blending is crucial in men's haircuts to ensure that different lengths work together harmoniously, avoiding harsh lines or abrupt changes in length. Thinning shears help achieve that fluidity and softness, contributing to the overall aesthetic of the haircut.

While other tools like razors and scissors can be used for various techniques in cutting hair, thinning shears are specifically designed for this blending purpose, making them the most suitable choice in this context. Razors can create texture and remove weight but are not primarily considered blending tools. Likewise, clippers are typically used for cutting hair to specific lengths and may leave more defined lines rather than blending, and while scissors can be used for blending, thinning shears are specifically designed to refine and soften the cut more efficiently.