Zirconia Finishing Kit Optimal processing of zirconium oxide The Zirconia Finishing Kit, developed with Dr. James Klim, DDS, is a combination of various carbide burs, a grinder, sintered diamonds, and polishers. These selected instruments are ideal for processing pre-sintered zirconia and enable ideal finishing of zirconia restorations. All instruments are suitable for use in the laboratory and can be conveniently stored in the high-quality bur stand.