Special single-use cylindrical file specially designed for the filing works in the Nails Extension procedures with the Nail Drill. The thick grit makes this file indispensable for modeling the UV Gel and the Acrylic materials in the stages of the artificial Nail shape definition, to soften and adapt the Tips forms and plastic prosthesis and also remove calluses or skin thickenings in the Manicure and Pedicure procedures. The special shape allows these abrasive cylinders to be grafted into the appropriate Mandrel Nail Drill Bit, which is sold separately. The materials that compose this file make it resistant to abrasion with a safe and comfortable employment that can reach 30,000 revolutions per minute. To avoid possible vibrations and to protect the safety and hygiene, it is suggested to change the cylinder for each single customer. Available in 4 different grits in box of 100 pcs.