4 easy steps to nail perfection.,Item details: Simple and easy to use, follow the 4 steps to remove any ridges and buff your nails to a smooth high gloss shine, Step 1- file your nails to the desired lengthnAlways file from the outside edge to the centre of the nail,Step 2- once a month use the black side to remove ridges from the nail surface, Step 3- once a week use the white side to gently buff and smooth the surface of the nail,Step 4- once a week use the grey side to produce a high gloss finish on the surface of the nail