DetailsBarrel shape for filing, shaping and shortening the free edge of the nail. Shape and create the perfect "C" curve. Use on acrylic, gel, fiberglass and silk. For use with Medicool's Pro Power 520, Turbo file II, Pro Power 30K, Nail Glide 2100, Pro Power 20K, PediNova III and also: KUPA, ASEPTICO, BRAVO, BUFFALO, NAIL LABO, LASCO, DREMEL, ERICA's. All bits have a 3/32" shaft.