Premium quality High-speed steel Titanium-coated Suitable for drilling soft metal, wood and plastic Edge ground Made from high-speed steel and titanium coated for longer life, this 99 piece drill bit set has metric size drill bits from 1.5mm to 10mmPieces Include:16x 1.5mm, 16x 2.0mm, 15x 2.5mm, 10x 3.0mm, 10x 3.2mm, 8x 3.5mm, 8x 4.0mm, 3x 4.5mm, 3x 5.0mm, 2x 5.5mm, 2x 6.0mm, 2x 6.5mm, 2x 8.0mm, 2x 10.0mm High quality High Speed Steel for proven capability of drilling plastic, wood, and sheet metal. Black Oxide Coating for ensured durability High performance carbide drills for aluminum materials 118 Degree Split Point tip design to help reduce walking, ensures clean & accurate hole drilling 99 pieces of drill bits of various sizes to meet most of your needs, include 2 x 10mm drill bits, 2 x 8mm drill bits, 2 x 6.5mm drill bits, 2 x 6mm drill bits, 2 x 5.5mm drill bits, 3 x 5mm drill bits, 3 x 4.5mm drill bits, 8 x 4mm drill bits, 8 x 3.5mm drill bits, 10 x 3.2mm drill bits, 10 x 3mm drill bits, 15 x 2.5mm drill bits, 16 x 2.0mm drill bits, and 16 x 1.5mm drill bits Along with a Plastic Case to keep drill bits organized while not in use.