Diamond bit D216cS has a rounded shape in the form of a “flame” with a dense diamond coating. This model is used to remove excess material in hard-to-reach areas under the nails and to correct the external shape of the modeled nail surface. To decorate gel and acrylic nails with conical rhinestones using a attachment in the shape of a “flame”, cells of the desired diameter are cut out. The whole structure of the attachment ensures the durability of the tool in operation and the convenience for the master. The long shank softens the vibration during the procedure and allows the tool to be controlled more accurately.