Diamond Nail Drill Bits D-84, shape rounded cone, head size 2.5x10 mm The Diamond Nail Drill Bits D84 are rounded cone-shaped bits the epitome of precision and versatility, designed to elevate your nail care procedures. Fine Bits (Red): Specially curated for sensitive skin: Treating Pterygium. Gently Raising Non-Adjacent Cuticles. Safely Opening Sinuses Medium Bits (Blue) used wide range of nail care procedures: Raising Non-Adjacent Cuticles. Opening Sinuses. Processing Side Rollers. Coarse (Green): excel in various applications: Efficient Nail Plate Removal. Treatment and Removal of Corns and Calluses. Removing Rough, Dry, and Dead Cuticles. Specifications: Speed Recommendation: Up to 25000 RPM. Shank Diameter: 3/32” Length: 44mm Head Dimensions: 2.4x10mm Bit Shape: Rounded Cone Material Head: Diamond Material Shank: Stainless Steel