Original KMIZ Nail Drill Bit [5‑Pack] - Diamond Drop Shape, 4.0 mm, Fine Grit, 3/32" Shank - E‑File Bit for Callus Treatment, Nail Smoothing & Cuticle Work

Diamond nail drill bit, model DFL 4.0-12F. Drop shape with rounded tip, 4.0 mm diameter, and fine grit. Designed for callus treatment, crack smoothing, nail plate refinement, and lateral nail fold work during e-file manicures and pedicures. The teardrop geometry offers dual-purpose contact — the rounded tip for precision work in narrow zones, the tapered body for efficient coverage on broader skin and nail surfaces. The 12.0 mm working part provides extended contact for continuous-stroke techniques on heels, plantar areas, and large nail surfaces. Fine grit ensures controlled abrasion without tissue damage, making it suitable for clients with sensitive skin or thin nail plates. Versatile enough for both hand and foot procedures. Manufactured by KMIZ (est. 1931) on Swiss precision equipment. ISO certified. CE marked. Shank diameter: 2.35 mm (3/32"). Working part length: 12.0 mm. ISO: 856.104.260.120.040.

• 5‑Pack KMIZ Nail Drill Bit DFL 4.0-12F - fine-grit diamond drop-shaped bits with a rounded tip and a 4.0 mm head, designed for callus treatment, nail plate smoothing, crack refinement, and lateral fold work during e-file manicures and pedicures. The teardrop profile combines the reach of a flame with the surface coverage of a ball, making it one of the most versatile shapes in a professional bit set. Manufactured by KMIZ - a medical instrument factory established in 1931, producing on Swiss Rollomatic CNC equipment with ISO 9001 and ISO 13485 certification.
• Fine diamond abrasive delivers smooth, even material removal without aggressive cutting or heat buildup. The rounded tip distributes pressure across a curved contact area, preventing point-loading that can gouge soft tissue or thin nail plates. The elongated body allows the technician to work with both the tip and the side of the bit - the tip for precision zones like nail folds, the midsection for broader areas like callused skin and nail surfaces.
• Used in pedicures for treating calluses on heels and plantar areas, smoothing cracked skin along the edges of the foot, and refining hardened lateral folds. In manicures, effective for gentle nail plate smoothing before product application and for reducing surface irregularities on deformed or ridged nails. The 12.0 mm working part covers large treatment areas in continuous strokes, reducing session time. Pairs with a ball bit for targeted spot work and a flame bit for tight cuticle zones.
• Standard 3/32" (2.35 mm) shank fits all professional electric nail file machines. Balanced construction provides stable rotation with minimal vibration at low to medium RPMs. Compatible with both right- and left-handed handpieces. The extended 12.0 mm working length allows long sweeping passes across skin and nail surfaces, reducing the need for frequent repositioning and lowering hand fatigue during pedicure sessions.
• ISO 856.104.260.120.040. Head diameter: 4.0 mm. Working part length: 12.0 mm. Shank: 2.35 mm (3/32"). Diamond coating retains grit consistency through repeated autoclave sterilization cycles. Suitable for both dry and wet techniques. Designed for trained nail technicians and podiatrists. The bit should be selected individually for each client and fully sterilized between uses.