For shine that's nothing short of brilliant! Designed for use on Artificial & Natural Nails. This 1000/4000 Grit Block & Long Buffer offer a brilliant final step in the nail finishing process! Outperforms , outshines and outlasts all other professional polishing files. Quickly and effortlessly brings artificial and natural nails to a highgloss shine. Green side removes imperfections; White side polishes to a shine that's nothing short of brilliant!