The DARK Rounded Cylinder Diamond Nail Drill Bit 3.9 mm – Red Fine Grit is a professional e-file attachment designed for gentle, precise treatment of cuticles, lateral nail folds, and mildly rough or keratinized 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, fine abrasiveness for controlled exfoliation and delicate skin refinement. The red fine grit is particularly suitable for normal, thin, and sensitive skin, making it an excellent choice for professional nail technicians and pedicure specialists who prioritize precision and client comfort.

The rounded tip allows for careful treatment around curved surfaces, while the cylindrical working area provides an extended contact surface for smoothing dry skin and refining lightly callused areas.

KEY FEATURES & BENEFITS

• Red Fine Grit: Soft abrasiveness suitable for normal, thin, delicate, and sensitive skin.
• Rounded Cylinder Shape: Combines an extended working surface with a rounded tip for precise, controlled treatment.
• High-Quality Diamond Coating: Provides uniform abrasive performance and consistent professional results.
• Even Diamond Grit Distribution: Helps achieve smooth, controlled exfoliation without irregular filing.
• Gentle Skin Refinement: Suitable for removing superficial dead skin cells and smoothing mild roughness.
• Durable Construction: Designed for 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 undergo coating inspection and shaft alignment checks for reliable 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: Red – Fine / Soft Grit
Material: Metal base with high-quality diamond coating
Recommended Use: E-file manicure, pedicure, cuticle care, lateral nail fold treatment, and gentle rough skin smoothing
Sterilization: Compatible autoclave or dry-heat sterilization according to manufacturer instructions

RECOMMENDED APPLICATIONS

• The DARK Rounded Cylinder Diamond Bit Red Fine Grit is designed for professional nail technicians who require gentle, controlled skin treatment.
• Cuticle Area Refinement: Carefully smoothing dry, keratinized skin surrounding the cuticle.
• Lateral Nail Fold Treatment: Gently removing superficial dead skin cells along the sides of the nail.
• Rough Skin Smoothing: Refining mildly hardened or dry skin around the toes.
• Light Callus Treatment: Smoothing superficial callused areas during professional pedicures.
• Pedicure Skin Refinement: Treating delicate areas that require a softer abrasive.
• Final Surface Smoothing: Refining previously treated skin for a smoother, more even finish.
• The fine diamond coating allows technicians to perform delicate finishing work without the aggressive abrasion associated with coarser drill bits.

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 skin condition, treatment area, and equipment specifications.
• Use light pressure to minimize friction and unnecessary abrasion.
• Keep the working surface moving evenly across the treatment area.
• Use the rounded tip carefully when working around curved surfaces and lateral nail folds.
• Avoid using the bit on irritated, inflamed, broken, or damaged skin.
• Choose a medium or coarse abrasive when treating significantly thickened skin that requires more intensive reduction.

Professional Tip: The 3.9 mm rounded cylinder shape offers a wider working surface than narrow flame-shaped bits, making it particularly useful for gentle smoothing of localized rough skin during professional pedicures. The red fine grit is especially beneficial for finishing work and delicate skin refinement.

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.
3. 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.
4. DRYING
   Thoroughly dry the bit after cleaning and disinfection, following the sterilizer manufacturer’s instructions.
5. STERILIZATION
   Sterilize using a compatible autoclave or dry-heat sterilizer. Follow the manufacturer’s validated temperature and sterilization cycle requirements.
6. STORAGE
   Store cleaned and sterilized bits in a dry, protected environment to prevent contamination and mechanical damage.
   For professional use only.

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.