Which Diamond Bit Grit Should You Choose forManicure? A Complete Guide for Nail

How do you know which diamond bit is right for you?

What is the difference between red, blue and violet grits? Which bit is suitable for thin skin and which one is better for coarse skin?

What color markings for diamond bits exist?

These questions regularly arise among both beginner and experienced nail technicians. The correct grit directly affects working speed, client comfort and the quality of the final result.

Formula Profi offers one of the widest ranges of diamond bits on the market — 10 grit options. With such a wide selection, it can be easy to get confused, so let us take a detailed look at the features of each one and their areas of application.

Why is it important to choose the correct diamond bit grit?

For fast and high-quality work, it is important for the technician to select the abrasiveness of the tool according to the specific case.

Each grit has its own purpose and performs best under certain conditions. Even with a high level of professional skill, an incorrectly selected bit can slow down the procedure, reduce the quality of skin treatment and make nail preparation for coating more difficult.

That is why it is important to understand the differences between different levels of abrasiveness and know in which situations each one works best.

What diamond bit grits are available?

All Formula Profi diamond bits can be divided into two main categories:

• classic grits;
• mixed grits.

Classic diamond bit grits

The classic range includes five internationally recognized levels of abrasiveness as well as Formula Profi’s proprietary violet grit.

Formula Profi uses double diamond coating technology in its production. Two layers of the same abrasive are applied to the working part, allowing the diamond particles to be distributed evenly and securely fixed to the surface.

Advantages of this technology:

• longer service life;
• even tool performance;
• stable efficiency;
• client comfort;
• reduced risk of skin injury.

The main difference between classic grits is the size of the diamond particles.

Yellow grit — very soft

Yellow grit is recommended for very thin, sensitive or damaged skin that requires the most delicate approach.

It is also well suited for working with teenage skin.

Advantages:

• minimal impact on tissue;
• extremely gentle work;
• high level of safety;
• comfort even for the most sensitive clients.

Red grit — gentle basic grit

Red grit is one of the most popular options among nail technicians.

It combines gentleness with sufficient efficiency for most standard procedures. For this reason, many professionals use it as their main working tool.

Recommended for:

• standard women’s manicure;
• thin and normal skin;
• delicate cuticle treatment.

Violet Pro violet grit — a universal choice

Violet Pro is a proprietary Formula Profi development created as a compromise between red and blue grits.

After its launch in 2025, it quickly became one of the favorites among nail technicians.

The main idea was to create a universal abrasiveness suitable for most situations. Red grit can sometimes be too gentle, while blue can be too aggressive. Violet occupies the middle position between them and combines their strengths.

Advantages of Violet Pro:

• versatility;
• comfortable work with most skin types;
• a good balance between gentleness and efficiency;
• suitable for both beginners and experienced technicians.

If you are unsure which grit to choose, violet is the safest and most universal option.

Blue grit — medium abrasiveness

Blue grit is also one of the most popular choices among nail technicians.

It has a more pronounced abrasiveness compared with red and violet, which allows faster work on denser skin.

Suitable for:

• standard manicure;
• lifting the cuticle;
• treating lateral nail folds;
• smoothing moderately coarse skin;
• certain pedicure procedures.

It may also be suitable for men’s manicure when there is no significant skin damage or excessive coarsening.

Green grit — for more difficult cases

Green grit has a fairly pronounced abrasiveness and is less frequently used in classic women’s manicure.

Best suited for:

• coarse skin areas;
• cracks;
• heavily worked hands;
• men’s manicure;
• pedicure;
• podiatry procedures.

Even at relatively low speeds, green grit demonstrates high efficiency and allows difficult areas to be treated quickly.

Black grit — maximum abrasiveness

Black grit is the coarsest of all available options.

It is not intended for standard manicure and requires a high level of control during use.

Most commonly used in:

• pedicure;
• podiatry;
• work with very coarse skin;
• complex professional cases.

What are mixed grits?

In addition to classic options, Formula Profi produces mixed grits:

• red-yellow;
• blue-red;
• green-blue;
• black-green.

These bits combine the properties of two neighboring levels of abrasiveness and are manufactured using a special technology.

How do mixed grits work?

Like classic models, mixed-grit bits have two layers of diamond coating. However, each layer contains abrasive particles of a different size.

Let us consider blue-red grit as an example.

First, a layer of blue abrasive is applied. Then the gaps between its particles are filled with finer red abrasive.

Thanks to this technology:

• the surface becomes more even;
• the diamond coating is fixed more securely;
• the service life of the tool increases;
• performance becomes more stable and predictable.

In terms of abrasiveness, mixed grits occupy an intermediate position between the two colors, with a slight tendency toward the coarser one.

For example, blue-red grit works more gently than blue but more actively than red.

Which diamond bit grit is the most universal?

If you need one bit for most procedures, Violet Pro violet grit is the optimal choice.

It provides a balance between gentleness and efficiency, suits most skin types and allows fast work without excessive aggressiveness.

Frequently Asked Questions

Which grit is suitable for beginners?

Violet or red grit is the best choice for starting out.

Which bit is suitable for thin skin?

Yellow grit is recommended for very sensitive skin.

What is the difference between a red and a blue bit?

Red works more gently, while blue provides more active skin treatment and faster results.

Which grit is suitable for men’s manicure?

Blue or green grit is most commonly used, depending on the condition of the client’s skin.

Which bit is best for most clients?

Violet Pro is the most universal option and is suitable for most manicure procedures.