Replace the aluminum oxide discs in any PMD Personal Microderm body exfoliating device with the PMD Replacement Disc Hand & Foot Kit. This set includes one small and one large red very coarse dermabrasion disc along with two small and two large black body-only discs. The discs in the Replacement Disc Hand & Foot Kit are designed for use on calluses and thick skin on hands and feet. While experienced Personal Microderm users can use red coarse discs on the face or body, these discs provide more intense exfoliation than the ultra sensitive white, very sensitive grey, sensitive blue, moderate green and coarse orange discs made by PMD.