8 Pack Refill Rollers for Electric Foot Callus Remover, Replacement Rollers Heads Foot Care Pedicure Tools, 3 Pack Extra Coarse, 3 Regular Coarse, 2 Gentle Coarse Refill Rollers for Electric Foot File8 SPARE GRINDING HEADS: 3 different levels of coarseness: Extra Coarse effectively removes harder cracked skin; Regular Coarse softens and smoothes normal hard skin; Light Coarse maintains a good routine and perfects finishing touches Foot Care: you can choose different thicknesses of grinding head and rotation speed according to the hardness of foot calluses Effective Exfoliation: The high quality rollers gently buff away rough, calloused skin for