Deluxe Burs, Round Assortment, 12 Pieces | BUR-500.00 Perfect for filing, stone setting and other jewelry applications Made of Vanadium steel; comes in reusable plastic pouch (wood stand not included) 44.5 millimeters long with 3/32 inch (2.35 millimeter) shank 12 round burs in sizes 0.80, 0.90, 1.00, 1.50, 1.80, 2.10, 2.50, 2.90, 3.50, 4.00, 4.50, 5.00