Strengthen your nails with the Sally Hansen Hard as Nails Treatment, an advanced nail strengthener formulated with Nylon to fortify fragile nails and help prevent peeling.Promoting stronger, smoother-looking nails, the tinted nail hardener works to protect and harden the nails while smoothing the look of ridges. Natural Omega 3 and Soy help diminish the appearance of ridges for smoother, shinier and healthier-looking nails. Extra strength formula.