The Gracey Dental Curettes 3-4 are bone curettes designed by Norralco, a German manufacturer. With a model number of 30-1210-RD-H2, these dental instruments are intended for use in dental laboratories and dentistry. This unit is a single piece and is made with precision and quality for surgical and orthopedic purposes. The Gracey Dental Curettes 3-4 are a reliable tool for dental professionals seeking high-quality instruments for their practice.