Which tool is specifically designed for removing calluses?

The foot file is specifically designed for removing calluses due to its coarse texture and abrasive surface, which effectively sloughs away dead skin and rough patches on the feet. This tool is essential for maintaining foot hygiene and comfort, as it helps to prevent the buildup of hard skin that can lead to discomfort or pain while walking.

In contrast, nail clippers are intended for trimming nails rather than addressing skin issues like calluses. A cuticle pusher is used for managing cuticles around the nails, which does not involve callus removal. A buffer is designed for smoothing and shining the surface of nails rather than dealing with callused areas on the skin. Therefore, the foot file stands out as the appropriate tool for specifically addressing calluses.