Won't Bend Easily - The fingernail files are made with top quality EVA, PS board and zebra sandpaper materials. Nail filers are made with robust construction, makes them strong. 100 grit boards are sturdy enough for pet grooming as a dog nail file or cat nail file. Also, it's gentle as baby nail file.Dual Sides - This nail file set is ideal to remove for acrylic and extension nails, file and rough up the hard fingernails and toe nails in 100 grit, while 180 grit smoothes up your nail edge with refined shape.(Note: The side with text is the finer 180 grit, while the side without text is the coarser 100 grit.)Professional Nail File Pack - 100 180 grit nail files for acrylic nails are made from heavy duty emery boards, which can be for removing gel nails top coat, such as nail polish, extension gel, dip & acrylic powder, shaping nail length and grinding & polishing natural and fake nail surface. It's a great nail file kit for different nails, especially thick nails & toenails.Warm Tip: New nail files 100/180 grit may have sharp edges. Before using a new emery board, you can rub two finger nail files against each other to reduce the sharpness of the edges. This will make it more comfortable to use.Enduring & Reusable - The nail files for gel nails can be easily cleaned with water and soap or disinfectant to maintain hygiene between uses. This nail files for natural nails ensures durability and longevity even with frequent use.Curved Nail File - With Ergonomic Design, its curved section makes it easier to file the sides of the nail, and the rounded edge is great for filling near the cuticle. It feels comfortable in your hand and is easy to operate with both left and right hands. A nail tech must haves.