?Customer Service?: A skin test before use is necessary. Stop using immediately once feeling uncomfortable! Please feel free to contact us by mail if you encounter any problems. We have a professional after-sales service team that can solve the problems for you more faster and effectively. ?Strong Effect Nail Strengthening Polish?: It can repair damaged nails, which are weak, split, chips, thin, brittle, or cracked. We recommend using it once every 7 days for better effect. ? Perfect Ridge Filler For Nails?: It can smooth your ridges or bumps on the nail surface and prevent discoloration, make your nails shiny, even, smooth, and show a natural tint color. ?Multifunction Nail Repair Kit?: As a nail strengthener for daily protection of natural nails, it helps to stronger nails. As a ridges filling, after applying, the nails' surface will be full and shiny, and have a light glitter-gold color, which will make them look low-key but noble.