The Callosity Files Double‑Sided BTB6‑1017 is a dual-textured foot-care instrument engineered for the safe and effective removal of hardened skin and calluses. One side features a coarser grit for aggressive exfoliation, while the opposite side is finer for smoothing and finishing. The unit is designed for durability, comfort and hygiene — suitable for professional use in salons, clinics, podiatry/dermatology, and at-home skin care routines.