4 sapphire heads form a professional basis, supplemented with round files, large and small tapered files, a disc file, cuticle pushers and a brush attachment. This is the ideal nail care solution, and it operates at two speeds. File off ingrowing nails and hard-to-get-at corners and edges. Remove corns and calluses. Shorten and shape your nails up to the corners. Remove hard, dry skin and hardened nails. Gently lift and push back the cuticles. Clean and polish your nails. You can do all this yourself.