This refill pack contains two roller heads.Designed for use with the Amope Pedi Perfect Electronic Pedicure Foot File and other Pedi Scholl products, this set of two Microlumina roller heads helps you quickly achieve soft, silky feet. The is designed to remove hard skin for smooth results after just one use. It buffs away hard skin in minutes, leaving you with smooth feet you'll want to show off.Exfoliates Quickly and EasilyEasy-to-Replace Roller HeadThe roller head should be replaced when it is worn. The wear depends on the intensity and duration of the treatment sessions. To replace the roller head, ensure the unit is turned off. Remove the roller from the unit by pressing the eject button on the side of the unit and gently pulling the roller away from the unit. Place the new roller in the unit by pressing in the pins on either side of the roller head and inserting the head into the device.