Primo® Diamond Plated Step Drills with 10mm head lengths, 3/32 inch (2.35mm) shanks, 45mm overall lengths. Choose from 5 different head diameters. Drills feature excellent balance, precision and consistent diamond coverage.
10908: 1.3 mm (0.051")
10909: 1.4 mm (0.055")
10910: 1.6 mm (0.063")
10911: 1.8 mm (0.071")
10912: 2.1 mm (0.083")
