What stainless steel implement can shorten the free edge of the nail quickly and efficiently?

The nail clipper is specifically designed for cutting nails, making it highly effective for shortening the free edge quickly and efficiently. Its sharp, curved blades allow for precise trimming, ensuring an even cut along the edge of the nail. This implement is commonly used in both professional and at-home nail care, providing a clean and straightforward solution for maintaining the desired nail length.

In contrast, a metal pusher is used primarily for pushing back cuticles rather than cutting nails. A nail nipper is typically intended for trimming hangnails or removing excess cuticle but is not the best tool for shortening the free edge due to its design and size. Tweezers are meant for gripping small objects and have no application in nail trimming. Thus, the nail clipper stands out as the appropriate choice for this particular task.