Product Guide

Technical Information

This page gives general technical information about professional e-file bits, nail drill bits, and manicure tools. It explains what common bits are made from, how they are constructed, and how nail techs should think about grit, fitment, cleaning, sterilisation, and storage.

Common Materials

Professional e-file bits are usually made from specialist materials chosen for hardness, cutting performance, wear resistance, and control. The most common types are diamond bits, carbide bits, ceramic bits, and polishing bits.

• Diamond bits use diamond abrasive on the working surface and are commonly used for cuticle work, sidewalls, natural nail prep, and detailed manicure or pedicure refinement.
• Carbide bits are made from tungsten carbide hard alloy and are mainly used for gel, acrylic, hard gel, polygel, and product removal.
• Ceramic bits are another removal-focused option and are usually compared with carbide for feel and heat behaviour.
• Silicone, stone, and polishing bits are used for smoothing, finishing, and surface refinement rather than heavy removal.

Carbide Bit Construction

Carbide nail drill bits are usually produced from tungsten carbide hard alloy. In quality carbide bits, the working head and shank must be securely joined so the bit stays stable under rotation.

Some manufacturers use brazing methods where the shank is seated into the head of the bit rather than simply joined end-to-end. This creates a larger joining area and improves strength at the connection point. Higher-grade carbide bits may also use surface treatments or diffusion hardening processes to improve surface strength, wear resistance, and working life.

Diamond Bit Surface

Diamond e-file bits are generally made by bonding diamond grit to the working part of the bit. The diamond surface gives controlled abrasion rather than the cutting action of carbide. This is why diamond bits are commonly chosen for manicure prep, cuticle-area refinement, sidewall work, and detailed natural nail services.

Diamond grit size and working-part shape both affect how the bit feels. A small flame bit, ball bit, or cone bit will behave very differently from a larger barrel or cylinder shape.

Shank Size and E-File Fit

Most professional nail e-file bits use a standard 2.35 mm shank, which fits standard electric nail file handpieces. This is the common fitment used for manicure and pedicure e-file work.

Always check that the bit is fully seated in the handpiece and that the handpiece is locked before use. A bit should run smoothly without wobble, vibration, or visible damage.

Shapes and Uses

Shape is just as important as material. The same grit in a different shape can feel completely different in use.

• Flame bits are commonly used for cuticle-area prep and sidewall access.
• Ball bits are often used for finishing around the cuticle area after prep.
• Cone and rounded cone bits are used for controlled detail work and smaller areas.
• Barrel bits give a wider contact area and are often used for surface work or product reduction, depending on material.
• Polishing bits are used for smoothing and finishing rather than aggressive cutting.

Grit Colours

Many professional bits use colour rings to indicate grit. Exact grading can vary by manufacturer, but the common direction is:

• Yellow: extra fine or very soft finishing grit
• Red: fine grit
• Blue: medium grit
• Green: coarse grit
• Black: extra coarse grit

Softer grits are usually preferred for delicate prep and finishing. Coarser grits are more suitable for product removal or heavier refinement when used correctly by a trained professional.

Cleaning and Sterilisation

E-file bits and manicure tools must be cleaned and disinfected according to professional hygiene requirements. Always remove visible dust and debris before disinfection or sterilisation. Tools should be dried properly before storage to help prevent contamination or corrosion.

Follow the sterilisation guidance supplied by the manufacturer of the tool or bit. Stainless steel tools, carbide bits, and diamond bits may have different care requirements. Do not mix tools with different cleaning requirements if the manufacturer instructs separate processing.

Storage

Store clean, dry bits in a suitable bit box or closed storage case. This helps protect the working surface, prevents bits from knocking against each other, and keeps the kit organised between clients.

Choosing the Right Bit

The safest way to choose a bit is to start with the service stage. Use diamond bits for prep and detail work, carbide bits for product removal, and polishing bits for finishing. Match the material, shape, and grit to the task rather than using one bit for everything.

Browse our Diamond Bits, Carbide Bits, Polishing Bits, and E File Bits categories to compare professional options.