1.Nano TechnologyThe nail file are both made of glass and epoxy.This material does not hurt the skin.This file set is fine and smooth enough, stronger, simpler, quicker and gentler to remove dead skin, cuticles and calluses. It can also be used on nails and toenail edges. Suitable for everyone. 2.Easy to CleanJust rinse the foot file and nail file directly under a tap. Fast to clean.If you want to clean it up betteryou can rinse files under hot running water after use.Lay files on a flat surface to dry. 3.Ergonomic DesignThis design makes the foot file and nail file easier to grasp. It's more refined than traditional foot and nail files.Both the foot file and the nail file have a two-sided design, one side is glass and the other side is glass gel. The foot file is also suitable for dry and wet feet. 4.Portable This package comes with a box and is extremely convenient for travelling.It's important to have a box to put in place when you're going somewhere else. 5.Durable to Save MoneyThe glass and epoxy materials make it very durable and not easily broken.Delicate and beautiful appearance can be given as a gift to family or friends.