Made of the finest Swiss-milled Vanadium steel for long life and accuracy. All burs are total length of 44.5mm with 3/32″ (2.35mm) shanks for quick-change handpieces. Our burs are the finest in quality at very reasonable prices and your satisfaction is guaranteed. This 12PC Round Bur Assortment includes 1 each of the following sizes: 0.80, 0.90, 1.00, 1.50, 1.80, 2.10, 2.50, 2.90, 3.50, 4.00, 4.50, 5.00mm. Comes with wood stand that provides convenience on the bench as well as storage.