Purpose:Cuticle cuttingGrindingSide sinus treatmentSide ridge treatmentSteel callus treatmentCuticle treatmentCrack treatmentNail piercingFeatures:Technology: Diamond coating for effective and fast treatment.Gritness: Red (soft), ideal for sensitive skin and thin surfaces.Head diameter: 4.0 mmShape: Ball, suitable for treatment of large areas and precise procedures on the surface of the nail.