Excellent piece - Polishing bafik, which is used in the final stage of manicure. 1 surface - the tough and rough, it is for the final polishing of the nail edge, to walk carefully so as not to remove the length, which gives nails before. 2 surface - removes nail unevenness, grooves. 3 - softer, gives smoothness. I combine 2 and 3 on the sensations. 4 - shine (really!). After all stages of the nails are smooth, shiny and do not exfoliate.