Diamond drill bit D-55, shape cylinder, head size 2.3x6 mm The Diamond Nail Drill Bits Cylinder shape designed for precision and efficiency, ideal for manicures and pedicures. 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. Upon completion of the work with a client, all bits that were used to perform the procedure must be washed, cleaned, sterilized and dried. A solution of at least 70% alcohol is recommended for effective disinfection. Speed recommendation: up to 25000 RPM. Shank diameter: 3/32” Shape: Cylinder