Diamond Nail Drill Bits D-54, shape cylinder; head size 2.1x6.0 mm The Diamond Nail Drill Bits in the Cylinder shape, meticulously designed for precision, versatility, and durability. There are three specialized variants: Fine (Red): recommended used: For removing the gloss of natural nails and preparing for acrylic buildup. Perfect for treating pterygium and gently raising non-adjacent cuticles. Safely opens sinuses during the process. Medium (Blue): recommended for: Correcting the free edge of the natural nail plate. Effectively lifts and removes cuticles, polishes periungual ridges, and prepares the nail plate for coating. Cleans the nail wall for a flawless finish. Coarse (Green): Perfect for: Efficient removal of part of the nail plate. For creating an arch under the nail and treating surface cracks. For the treatment and removal of corns and calluses. Specifications: Speed Recommendation: Up to 25000 RPM Shank Diameter: 3/32” Length: 45mm Head Dimensions: 2.1x6 mm Bit Shape: Cylinder Material Head: Diamond Material Shank: Stainless Steel