Ped Egg, Electrical Personal Care has a diamond crystals and electronic foot file. Ped Egg, Electrical Personal Care extra coarse roller head with long lasting micro-abrasive particles now comes with finely ground diamond crystals. It buffs away hard skin in an instant leaving with fabulous visibly smooth feet. It's easy to use and gently rotate the file over hard skin and see the dead skin disappear. Ergonomically-designed soft touch handle and replaceable roller head with diamond crystals gentle and effective rotating action. It is battery operated and ready to use.