Diamond Nail Drill Bit D-30, shape inverted cone, head size 5x6 mm Diamond Bits elevate nail care routine, offering precision and quality for diverse applications. Diamond Nail Drill Bits, Model D30, have a fully covered head with diamonds and rounded edges, minimizing the risk of injury. They are available in two variations suitable for different needs. Fine Bits for Sensitive Skin (Red): Specially designed for sensitive skin. Ideal for treating pterygium. Safe for opening sinuses and skillfully treating the nail wall. Medium Bits for Versatile Use (Blue): Recommended for precise side roller processing. Perfect for shaping the nail's free edge. Effective in cleaning nail grooves and rounding nail corners. Specifications: Speed recommendation: Up to 25000 RPM. Shank diameter: 3/32” Head dimensions: 5x6mm Length: 44mm Grit: Fine, Medium Shape: Inverted Cone Material head: Diamond Material shank: Stainless steel