Specific file for Nail Reconstruction processes with a core made of durable and flexible plastic material. The 100/180 grain makes this file indispensable for modeling UV Gels and Acrylic materials in the phases of defining the curvature of the Reconstructed Nail and for softening and adapting the forms of Tips and Plastic Prostheses. The materials that make up this file make it washable with liquids and therefore sterilizable. The particular rectangular shape allows for a larger filing area than normal straight or Curved files.