Nail Tek Nail Recovery Kit for Weak, Damaged Nails helps repair nail damage to weal, damaged nails and toes. Kit Includes: Xtra 4 Strengthener, Foundation Xtra 4 Ridge Filler and Renew Cuticle Oil Xtra 4 Strengthener is a highly effective treatment designed for nails resistant to conventional therapies and provides the extra strength necessary to correct severe nail weakness. Foundation Xtra 4 Ridge Filler is a special blend of strengtheners, conditioners, micro-fibers, and natural fillers that promotes polish adhesion and fill unsightly ridges. Renew Cuticle Oil is a unique blend of effective ingredients, essential oils and rich moisturizers that protect and maintain healthy cuticles and nails.