Nail HQ Essentials Hardener is specifically formulated for thin and weak nails. The external reinforcement provided by this Mineral-enriched formula will help nails become tougher and more bend resistant.This formula is designed to help toughen and protect the nail. It will help prevent nail brittleness and splitting to normalise and promote nail growth.This product contains collagen and a unique mineral complex infused with Calcium, Iron, Magnesium, Aluminium and Manganese.