Which tool is commonly used for shaping and smoothing acrylic nails?

The tool commonly used for shaping and smoothing acrylic nails is a file. In the process of applying acrylic nails, a file is essential for refining the shape of the nails, ensuring they have a neat and polished appearance. Different types of files, such as emery boards and glass files, can be used to achieve various levels of smoothness and to contour the nail edges according to the desired style.

While buffers can also be used to smooth the surface of acrylic nails, their primary function is to add shine rather than to alter shape. Cuticle pushers are designed for caring for the cuticle and nail plate area, and nail clippers are typically utilized for shortening natural nails or artificial tips before filing. Thus, for specifically shaping and smoothing the nails, a file is the most appropriate tool.