The DARK Rounded Cylinder Diamond Nail Drill Bit 3.9 mm – Blue Medium Grit is a professional e-file attachment designed for efficient callus removal, rough skin smoothing, and precise treatment of thickened skin during hardware and combined manicure and pedicure procedures.

Featuring a rounded cylinder shape and high-quality diamond coating, this nail drill bit provides consistent abrasiveness and controlled removal of keratinized skin. The medium grit is particularly suitable for working with denser, rougher, and moderately callused skin, making it an excellent choice for professional nail technicians and pedicure specialists.

The rounded tip allows for controlled treatment around curved surfaces, while the cylindrical working area provides a larger contact surface for efficient smoothing and refining of rough skin.

KEY FEATURES & BENEFITS

• Blue Medium Grit: Provides effective abrasion for moderately rough, thickened, and callused skin.
• Rounded Cylinder Shape: Combines a broad working surface with a rounded tip for precise, controlled skin treatment.
• High-Quality Diamond Coating: Ensures consistent abrasive performance and reliable professional results.
• Uniform Diamond Grit Distribution: Helps achieve smooth, even exfoliation without irregular filing.
• Durable Construction: Designed to withstand regular professional use and compatible sterilization procedures.
• Versatile Application: Suitable for professional e-file manicures, dry pedicures, and combined nail care techniques.
• Professional Quality Control: DARK diamond bits feature inspected diamond coating and checked shaft alignment for consistent performance.

PRODUCT SPECIFICATIONS

Brand: DARK
Country of origin: Ukraine
Product Type: Diamond Nail Drill Bit
Shape: Rounded Cylinder
Diameter: 3.9 mm
Working Head Length: 12 mm
Shank Length: 32 mm
Shank Diameter: 2.35 mm
Abrasiveness: Blue – Medium Grit
Material: Metal base with high-quality diamond coating
Recommended Use: E-file manicure, pedicure, callus removal, and rough skin smoothing
Sterilization: Compatible autoclave or dry-heat sterilization according to manufacturer instructions

RECOMMENDED APPLICATIONS

• The DARK Rounded Cylinder Diamond Bit is designed for professional nail technicians who require efficient and controlled skin treatment.
• Callus Removal: Reducing localized areas of thickened and keratinized skin during professional pedicures.
• Rough Skin Smoothing: Refining dry, hardened skin around the toes and nail folds.
• Lateral Nail Fold Treatment: Smoothing rough skin along the sides of the nail.
• Pedicure Skin Refinement: Working on moderately callused areas of the feet with controlled movements.
• Final Surface Smoothing: Refining previously treated rough skin for a smoother, more even appearance.

PROFESSIONAL WORKING RECOMMENDATIONS

• For optimal results, use the DARK Rounded Cylinder Diamond Bit with an appropriate e-file speed and minimal pressure.
• Maintain smooth, continuous movements without holding the bit in one area for too long.
• Select the appropriate rotation speed based on the skin condition, treatment area, and equipment specifications.
• Avoid excessive pressure to minimize friction and overheating.
• Use the rounded tip carefully around curved surfaces and sensitive areas.
• Do not use medium-grit diamond bits aggressively on thin, irritated, or damaged skin.
• Choose a softer grit when working with delicate or sensitive skin.

CLEANING, DISINFECTION & STERILIZATION

Proper maintenance helps preserve the diamond coating, extend the service life of the bit, and maintain professional hygiene standards.

1. MECHANICAL CLEANING
   After each use, remove visible dust and debris with a stiff-bristled plastic cleaning brush. Avoid metal brushes that may damage the diamond coating.
2. ULTRASINIC CLEANING
   Use an ultrasonic cleaner with a suitable instrument-cleaning solution when recommended by the manufacturer.
   DISINFACTION
   Immerse the bit in a professional disinfectant compatible with diamond-coated instruments. Follow the manufacturer’s recommended concentration, contact time, and rinsing instructions.
   Excessive disinfectant concentration may damage the diamond coating and shorten the service life of the instrument.
3. DRYING
   Thoroughly dry the bit after cleaning and disinfection, following the sterilizer manufacturer’s instructions.
   STERILIZATION
   Sterilize using a compatible autoclave or dry-heat sterilizer. Follow the manufacturer’s validated temperature and sterilization cycle requirements.
4. STORAGE
   Store cleaned and sterilized bits in a dry, protected environment to prevent contamination and mechanical damage.
   For professional use only.
5. WHY CHOOSE DARK ROUNDED CYLINDER DIAMOND NAIL DRILL BIT?

The DARK Rounded Cylinder Diamond Nail Drill Bit 3.9 mm Red Fine Grit is a versatile professional e-file accessory for nail technicians specializing in hardware manicures, dry pedicures, and delicate nail care.

Its high-quality diamond coating, rounded cylinder design, and soft abrasiveness make it an excellent choice for gentle cuticle care, lateral nail fold treatment, light callus smoothing, rough skin refinement, and professional pedicure finishing.

Whether you’re expanding your professional nail drill bit collection or looking for a reliable fine-grit diamond bit for everyday salon use, DARK offers the precision, durability, and consistent abrasive performance needed for professional nail care.

PLEASE NOTE: The product image on the website may differ slightly from the actual product due to the lighting and screen calibration.