OPI are currently one of the biggest manufacturers of nail products and are known worldwide. They sell in over 103 countries and are constantly expanding. Also they research into trends and release collections and core shades to fit the trends. All of their products are equally high quality and fit the exact same standard. They sell over 55,000,00 bottles of lacquer and treatments each year which stands to prove the success and demand of their products. OPI produce high quality and highly pigmented shades they also carry a huge range of colours and are constantly adding more collections and core shades. Also they create many nail treatments and accessories designed to help improve the condition of your nails. Nails will be left looking polished and clean. Specially designed to allow for precise and effortless filing. Designed to be used on natural nails. This file is fairly flexible so you can get to all parts of your nail.