A rotary cutting device made of high-grade steel with the working end coated with particles of diamond, and which is designed to fit into a dental handpiece that provides the rotation allowing the user to cut hard structures in the mouth, such as teeth or bone. It can also be used to cut hard metals, plastics, porcelains and similar materials intended for use in the fabrication of dental devices. It is available in various shapes (e.g., cylinder, disk, sphere, oval). This is a single-use device.