15pc High Speed Steel Twist Drill Bits. Sizes: 2.05mm, 2.1mm, 2.15mm, 2.2mm, 2.25mm, 2.3mm, 2.35mm, 2.4mm, 2.45mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, and 3.0mm - Case color may vary. For use with Dremel Rotary Tools.