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Also called Jumbo File and/or Mambo File. This double form File, a curved side and one straight side, is specific for the Nails Extension makings having a core made of resistant and flexible plastic material. The 100/180 grit makes this File indispensable for modeling the UV Gel and the Acrylic materials in the stages of definition of the bead of the artificial Nail and to soften and adapt the Tips forms and plastic prosthesis. The zebra-striped effect given to this file characterised from particular treatments facilitates and sweetens the filing, supporting the success of the job. The materials that compose this file make it washable with cleaner liquids and then sterilised. The special curved shape attributes to this file the ability to reach the most critical points of the nail surface close to the cuticles. It is considered as an essential tool for every Professional Nail Artist. This file, by possessing within itself the double shape, ensures a saving of time in the Nails Extension makings, because it does not oblige the Nail Artist to change file for each different stage of work.