This set of 40 dental polishing, contouring, and finishing discs with a stem wheel mandrel has been designed for use in dental laboratories and practices. Each kit includes the following: 10 pieces of each Coarse, Medium, Fine, Superfine 10 DISCS - 14MM - SHAPING 10 DISCS - 14MM - SMOOTHING 10 DISCS - 14MM - PRE-POLISHING 10 DISCS - 14MM - POLISHING 1 RA Mandrel These discs are compatible with a variety of dental composite materials and are ideal for creating smooth, precise finishes on dental restorations. Great for polishing composite, ceramic, and glass ionomer dental restorations. These Tethjoy by JSP discs are made in the United States and are intended for use in dentistry and dental laboratory work. Whether you're a professional dentist or a dental technician, this set of discs is an essential tool for achieving high-quality dental restorations.