The ALL-IN-ONE bit is a multi-function that can be used to clean the cuticle area, shape, shorten, smooth, removethe surface, and clean under the nail. As a result, improve work efficiency and simplify nail work without having to change the bit. Like with all our tools made of the highest quality carbide which means our bits are sharp, longer-lasting, and durable.* Removes acrylic nails, dip powder, polygel, and hard gel with ease.* Two way cut designed to cut smoothly in clockwise and counterclockwise directions for both right and left handed users.Startool’s ALL-IN-ONE comes in 6 different sizes / grits: Fine, Medium, Coarse, Extra-Coarse, 2X-Coarse, 3X-Coarse. Each bit has 3 coarseness of grits.