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. Each set of 12 contains the same shape burs in sizes: 0.90, 1.00, 1.20, 1.40, 1.50, 1.60, 1.80, 2.00, 2.30, 2.50, 2.70, 3.00mm. The hang-up reusable plastic pouch keeps cutting heads apart and takes up very little storage space.