Hand-operated tools and instruments for the dental technician, that are not used on patients, namely, handles for dental instruments not used on patients, tools and dental structures, holders for maintaining dental structures in a fixed position for processing and polishing same, countersinking tools for the preparation of screw seats in dental structures, milling cutters for processing abutments, drills for plastic material, grinding tools for processing abutments, reamers for fining casted ...