1.Regular or long-term use strengthens and hardens nails, reduces nail splitting, chipping and peeling, and allows nails to grow into healthy and beautiful nails! 2.Multi-color optional trimming and polishing tools are available on both sides. Skillfully shape nails, comfortable, convenient and efficient. A smooth and gentle nail file. 3.Don't go back to harmful nail files, it will tear and damage the keratin layer of your nails. The glass file seals the keratin layer on the edge of the nail, making the nail smooth and healthy without serrated edges. 4.Small and lightweight, easy to carry, very suitable for outdoor travel and family life. 5.Beautifully packaged, the nail file can be protected when not in use. Material: plastic, stainless steel, nano glass Color: green, pink, blue, white Product size:14* 1.2* 0.3 CM Package contents: Nail file*1, Jianzi*1  1.Regular or long-term use strengthens and hardens nails, reduces nail splitting, chipping and peeling, and allows nails to grow into healthy and beautiful nails!  2.Multi-color optional trimming and polishing tools are available on both sides. Skillfully shape nails, comfortable, convenient and efficient. A smooth and gentle nail file.  3.Don't go back to harmful nail files, it will tear and damage the keratin layer of your nails. The glass file seals the keratin layer on the edge of the nail, making the nail smooth and healthy without serrated edges.  4.Small and lightweight, easy to carry, very suitable for outdoor travel and family life.  5.Beautifully packaged, the nail file can be protected when not in use.