Lexicon – exceptional quality with Swiss-made precision technology. Exclusively from DENTSPLY Tulsa Dental Specialties, Lexicon is the name you trust for endodontic innovation, convenience and excellent service. About Lexicon Gates Glidden Drills: Stainless Steel Excellent for use in bulk removal of the tooth structure Available in sizes 1-6 Available in assorted pack Available in 28 and 32 mm lengths Available in six packs