MCDS2086 Over 40 Years of Superior Quality. Shape, file, smooth shine your nails. Files: Two filing surfaces shape and finish nails. Coarse, black file is best for shaping nails. Fine, white file is best for finishing nails and smoothing out any rough edges. 4-Step Buffing: Removes stains and ridges. Creates a smooth nail surface. Gives nails a natural, high-gloss shine without polish. Precision Crafted Hand Inspected Quality Revlon Implements meet exacting design and quality specifications. They are made of the finest materials and are fully inspected to assure exceptional performance. 309972530288