PROFESSIONAL PEDICURE TOOL: This Oak Leaf Electronic Pedicure Foot File gently and effectively removes dead skin, hard skin, wrinkles and calluses keeping feet smooth and soft with no skin irritation. Safe for removing hard skin from your feet at home.360°SPINNING: The mineral pumice stone roller head spins 360 degrees and 50X/second for quick results on thick calloused skin, convenient for either hand use in a comfortable position for self use. Do not apply pressure or use for more than 3-4 seconds on same area as this electric callus remover is very powerful.CONVENIENT BATTERY USE: The Oak Leaf Electric Callus Remover cooperates with 4pcs of 5# battery (not included), 6 hours of consistent use with brand new batteries, hassle-free from a connecting wire limit.Replaceable Stone Roller: Specially designed Micralumina replaceable head with Mineral Pumice Stone Rollers for continuous filing results. Money-saving and eco-friendly.Warranty: Oak Leaf offers 100% satisfaction guarantee. 30 days full money back guarantee and 1 year replacement warranty. Once any issue about the product occurs, please feel free to contact us.