These 2 x Diamond Crystal Replacement Roller Heads for Electronic Pedi Foot File are high quality! No need to throw out your unit, just change the heads to renew the power and improve results.Use this replacement pack to replace your existing worn out rollers with a brand new pack which contains 2 rollers. Its gentle on your feet and easy to use, the velvet smooth replacement rollers can give you soft, silky feet in no time at all. No need to be content with rough, hard, dry, cracked and callused skin as this is the ideal solution to take care of your feet. They are made with small crystal granule to provide a medium course surface to file away that hard dry skin with ease.