15 High Speed Twist Drill Bits Great for Goldsmith, Silversmith, Metal Working.

Great for drilling Non Ferrous and Ferrous metals,

These bits measure approximately: 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95 and 1 mm

Inches: (0.011", 0.013", 0.015", 0.017", 0.019", 0.021", 0.023", 0.025", 0.027", 0.029", 0.031", 0.033", 0.035", 0.037" and 0.039").