What is a key concern when using electric files on nails?

Over-filing is a key concern when using electric files on nails because it can lead to significant damage to the natural nail. This excessive filing can weaken the nail structure, resulting in thinning, brittleness, or even painful damage that may require time to heal. Proper technique and control are essential to avoid this risk, as well as knowing when to switch to a gentler approach, especially when working near the cuticle or on weak nails. Maintaining a balance between efficiency and safety when using electric files is crucial to provide quality nail care without compromising the health of the nails.

While the other options may have relevance—such as the cost of the equipment, the weight affecting its usability, or the noise being a factor in the salon environment—these do not directly impact the safety and outcome of the filing process as much as the risk of over-filing does. Understanding this concern is vital for any technician to ensure a professional service that prioritizes nail health.