General description BlueSpot Tools HSS Drill Bit Set is manufactured from high-speed steel, ensuring increased durability and longevity. The set features a ground flute design that enhances accuracy during drilling. It is suitable for use on various materials including iron, non-ferrous metals, plastic, steel, and wood. The drill bits are supplied in a robust metal case for easy storage and transport. Technical specifications Material: High-speed steel Number of pieces: 25 Sizes included: 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, and 13mm