Round Bur Set Sizes .80 To 2.30 12pc - BUR-500.01 Perfect for filing, stone setting and other jewelry applications Made of Vanadium steel; comes in reusable plastic pouch Swiss made 44.5mm long with 3/32 (2.35mm) shank 12 round burs in sizes 0.80, 0.90, 1.00, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 2.10, 2.30