About Product:Method of use; From both sides to nail file, nail tip center direction and a direction, in the same place down several times, after moving to other parts of the mill, this circular grinding down really armor, with sponge down for the uneven surface of the nail has obvious treatment effect, can process flat of fingernail surface uneven, reuse buffer, will make your nails guanghua beautiful moment.\n\nUsage: first use coarse sand surface, then use fine sand surface;\nEfficacy: remove fine lines on nail surface. Sand bar to be used with polishing block;