Harder, stronger nails with black diamond particules.Double patented ingredients of micro diamond particles and hardening agent. Instantly reinforces thin, weak and fragile nails by building a hard protective and glossy shield.This quick drying hardener shield helps to prevent chipping, breaking and splitting of nails after 4 weeks of regular use.**Results of 4 weeks of use efficacy test.How to use:- Shake gently- As a base coat, apply one coat on clean and dry nails and let it dry well before application of nail lacquer.- For extra protection, apply 2 coats on bare nails.- Regularly use 2 coats once a week for the best hardening result.