LNAUJS Nail Files 40-Pack Black — 100/180 Grit Double-Sided Emery Boards with Cushioned Foam Core for Professional Shaping and Smo

These compact 179 x 19 x 4 mm files combine a coarse 100-grit side for fast shortening and a finer 180-grit side for refining edges and finishing surfaces. Each board includes a cushioned foam core that improves control and reduces hand fatigue, while the black emery surface resists wear for repeated use. Supplied in a bulk pack of 40, they’re convenient for multi-client salons, nail artists, or anyone building a DIY manicure kit.

How do I use the two grit sides for best results?

Start with the coarse 100-grit face to reduce length or reshape very hard nails and toenails, using even strokes in one direction. Flip to the 180-grit side to smooth the edge, refine the curve, and remove visible scratch marks for a polished finish.

• 100 grit: fast shortening, rough shaping, thick or artificial nails.
• 180 grit: smoothing edges, refining shape, final prep for polish.
• Use gentle pressure and single-direction strokes to prevent splitting.

Can these files be reused and are they easy to clean?

The emery surface and foam core are made for multiple uses; after filing, rinse each board under running water to remove dust and residue. Allow files to fully air dry before storing to keep the abrasive surface effective and to prevent mildew.

• Rinse and brush off debris after use.
• Air dry flat—do not soak in solvents or high heat.
• Replace when the grit becomes smooth or damaged.

Will these files work on acrylics, gel, and natural nails?

Yes. The 100/180 grit combination covers common salon needs: the coarse side tackles acrylic or thick artificial products, while the finer side refines natural nail edges without excessive abrasion. Adjust pressure and stroke direction depending on nail hardness to avoid over-filing.

• Acrylics and thick tips: use 100 grit for shaping.
• Gels and overlays: alternate sides for shaping and smoothing.
• Natural nails: favor 180 grit for gentle finishing.

What size and packaging can I expect?

Each file measures 179 x 19 x 4 mm (about 7 x 0.75 x 0.16 inches), a slim profile that fits comfortably in hand and in professional kits. The set contains 40 identical black emery boards—an economical quantity for salons, nail technicians, or frequent home users.

• Compact size for precise control and portability.
• 40 files per pack for repeated sessions or multiple clients.
• Black finish hides wear and provides a sleek look.

Who is this for: The LNAUJS 40-pack black nail files suit nail technicians, beauty students, and at-home mani enthusiasts who want a reliable, reusable emery board set with both coarse and fine grits. They are ideal for busy salons needing bulk supplies, artists who prep many nails, and anyone building a complete nail-care kit without frequent replacement.