Ruby crystal 3 piece buffer refill set, from the #1 natural nail care system in the world Buffer #1 is for cleaning: aluminum oxide crystals gently exfoliate nails and help remove dirt, grease, discoloration and unsightly ridges. Buffer #1 deposits a fine dust of microscopic keratin particles to help replenish, improve the quality of the nail and set up the nail bed for buffer #2; buffer #2 is for conditioning: the crystal dust from the ruby crystal stone nail file and the keratin particles left from buffer #1, will aid in structuring the nail bed for buffer #2 and aid in stimulating, smoothing and preparing the nail for buffer #3; buffer #3 will dramatically shine and seal your nails, giving them a finished look in minutes. Use with the other ruby crystals nail care products, your nails will thank you.