Made from high speed steel with a black oxide coating providing resistance to heat and wear, the HHS jobber drill set features 170 pieces and comes in a convenient and robust carry case for easy tooll identification and portability. Features and Benefits • Roll forged from HSS, ensuring uninterrupted grain structure for exceptional strength and durability • Tips are ground for effective cutting • Suitable for drilling wood, plastic, carbon and plain steels where the cutting efficiency of ground flute is not required Specifications • Material: High speed steel • Coating: Black oxide • Manufactured to BS 328 : Part 1 • 1986 & DIN 338 Type N Contents • 170 Piece Drill Set (mm): 1.0 x 10, 1.5 x 10, 2.0 x 10, 2.5 x 10, 3.0 x 10, 3.5 x 10, 4.0 x 10, 4.5 x 10, 5.0 x 10, 5.5 x 10, 6.0 x 10, 6.5 x 10, 7.0 x 10, 7.5 x 10, 08.0 x 10, 8.5 x 5, 9.0 x 5, 09.5 x 5, 10.0 x 5. Typical Applications • Drilling • Steel • Stainless steel