I've never had strong nails. For a professional guitarist, this is a big problem. I've been looking for solutions since the beginning of my career, and, touring around the globe, I was able to try different products for my nails. Through trials and errors, I was able to develop the best solutiion to maintain my nails, and with them, mi career in perfect shape during the last 30 years as a touring musician and teacher. Here is this solution