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

Cobalt Steel - Manufactured from M35 grade cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, measuring Rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to twelve times when compared with an average HSS drill bit. Superior Heat Resistance - Withstand high temperatures during prolonged drilling, ensuring consistent performance. Particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too. 19PC Set - The set includes 19pcs of M35 cobalt steel twist drill bits: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7 mm, 7.5mm, 8 mm, 8.5mm, 9 mm, 9.5mm, 10 mm. Well organized in a tough metal indexed storage case for easy transport to your worksite. Metalworking - Particularly successful in cutting through hard metals(hardness less than HRC38°) such as stainless steel and cast iron, although they can be used for softer materials like copper and aluminium, too. Precision Cutting - The 135° quick-cut split points are self-centered and will penetrate quickly with less pressure. No center punch is needed. Will not "walk" or "wander". Professional Quality: Built to meet the demands of heavy-duty use, perfect for contractors, machinists, and serious hobbyists.