Quick answer
For shaping and removing bulk from acrylic nails, choose a 100 grit file for speed; for smoothing and refining after shaping, a 150 grit file gives a finer finish without over-filing.
Why grit matters for acrylic nails
Acrylic is harder than natural nails, so the file grit directly affects how fast and smooth you can work. A coarser grit (lower number) removes material quickly but leaves a rougher surface. A finer grit (higher number) takes off less material but produces a smoother finish.
Choosing the wrong grit can slow you down or damage the acrylic. Using too fine a grit for bulk removal takes extra time and effort, while using too coarse a grit for finishing can leave scratches that need extra buffing.
Trade-offs between 100 and 150 grit
100 grit files are aggressive. They cut through acrylic fast, making them ideal for initial shaping, shortening length, and removing product bulk. The downside is that they leave a rougher surface that requires a finer grit to smooth out.
150 grit files remove material more slowly but leave a much smoother surface. They are better for refining shapes, blending edges, and final smoothing before buffing. However, they are not efficient for heavy removal and will wear out faster if used for bulk work.
Decision rules for 100 vs 150 grit
- Use 100 grit when: You need to remove bulk acrylic, shorten length, or do heavy shaping. The coarse grit cuts fast and saves time on thick product.
- Use 150 grit when: You are refining the shape, blending the smile line, or smoothing the surface after bulk removal. It leaves a finer finish and reduces the need for extra buffing.
- Switch grits during the same service: Start with 100 grit for shaping, then switch to 150 grit for smoothing. This two-step approach balances speed and finish quality. Keep both grits in your kit for efficient acrylic work.
Product facts
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Premium Jumbo Square Shape 100/100 File (50 pcs): The Premium Jumbo Square Shape 100/100 File has dual 100 grit on both sides and a jumbo square shape for a large filing surface. This file is ideal for fast bulk removal and shaping on acrylic nails, especially when you need to cover a large surface area quickly.
Premium Jumbo Square Shape 100/100 File (50 pcs)
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Premium Jumbo Square Shape 150/150 File (50pcs): The Premium Jumbo Square Shape 150/150 File also has a jumbo square shape but uses 150 grit on both sides for finer abrasion. Use this file after shaping to smooth and refine acrylic edges without scratching the surface, giving a more polished result.
Premium Jumbo Square Shape 150/150 File (50pcs)
Which grit fits your workflow?
Best for
- Nail technicians who do a lot of acrylic fills and need fast bulk removal
- Artists who want a smooth finish without extra buffing steps
Not for
- Someone looking for a single file to do both shaping and finishing — you will likely need both grits
- Technicians who prefer a very fine finish and never need aggressive removal
