KEY FEATURES? 3-in-1 Grit System #80 Coarse Grit: Rapidly removes stubborn calluses and thickened skin #150 Medium Grit: Smooths rough edges and prepares surfaces for polishing #240 Fine Grit: Delivers final buffing for baby-soft skin and glossy nails MULTI-SCENARIO COMPATIBILITY? Beauty Applications Remove gel polish & acrylic nails gently Shape natural/artificial nails without chipping Smooth cuticles and foot calluses? Home & Workshop Use Refinish wooden furniture edges Polish 3D printed model surfaces Prepare metal/plastic parts for painting