What tool is primarily used to shorten the free edge of the nail quickly and efficiently?

Nail clippers are specifically designed to quickly and efficiently shorten the free edge of the nail. They feature a sharp, curved edge that easily cuts through the nail material, allowing for a clean and precise trim. This tool is ideal for both natural nails and artificial nail enhancements, facilitating a straightforward approach to nail shaping and maintenance.

In contrast, a nail file is primarily used for smoothing and shaping the edges after cutting, rather than for the actual shortening task. Cuticle scissors are intended for trimming the cuticles or hangnails, while a nail buffer is used for polishing and shining the nail surface rather than altering length. Thus, nail clippers stand out as the optimal choice for the specific need of shortening nails efficiently.