These elegant crystal nail produced from hard-wearing Czech-tempered glass which is unparalleled in its durability. Adorned with sublime Swarovski crystals for the most elegant and stylish finish imaginable. Amazingly the crystal glass nail file works very well on extremely hard nails as well as very soft nails. Since the surface of the glass nail file is so fine and uniform, regular use will actually help grow more beautiful nails, they will be healthier and smoother.