Hyjoy 19-Piece M35 Cobalt Steel Drill Bit Set in Indexed Case, Metric Sizes 1mm to 10mm, Dual Flute, 135° Split Point, Chamfered Straight Shank, for

Cobalt Steel Made from M35 grade cobalt steel, with molybdenum and cobalt added to form hardened alloy, achieving hardness to 67, enabling much quicker and extended durability, with to twelve times the lifespan compared to standard HSS drill bits. Resistance Withstand temperatures during prolonged use, ensuring consistent . Particularly successful in through hard metals such as steel and cast iron, although they can be for softer materials, too. 19-Piece Set: The set contains 19 pieces of M35 cobalt steel drill bits: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm. Organized in metal indexed storage case for transport to your worksite. Metalworking Especially effective in through hard metals (hardness below HRC38°) steel and cast iron, though they can also be utilized for softer materials such as copper and aluminum. The 135° quick-cut split points are self-centering and will penetrate quickly with less pressure. No center is needed. Will not "walk" or "wander".