Hard As Nails was one of the first commercially successful nail strengtheners, launching Sally Hansen into the spotlight and becoming a signature product of the brand. Its formula aimed to prevent chipping and splitting, addressing a common concern among women.

Over time, the Sally Hansen product line expanded beyond nail strengtheners to include a wide array of nail polishes, treatments, and tools. The brand consistently innovated to address various nail care needs and aesthetic preferences, contributing to its sustained market leadership.