Fiberglass nail file suitable for fingernails and toenails.
Suitable for filing with the medium grit side (120) and outlining with the fine grit side (180).
A high grit number (280-220) means it is composed of many, but very small, grits, making it smoother. A low grit number (120-180) indicates that the grit is coarser; it is recommended for thinning or initial filing.
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