This set of engineering quality drill bits is crafted from M35 steel with 5% cobalt, providing extended life and superior performance, especially when drilling challenging materials like stainless steel and high alloy steel. The precision ground tip and 135° split point ensure accuracy for centring during spot drilling, making these bits ideal for tough or hard metal applications, including high tensile and hardened steels. Sizes : 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 5mm, 5.5mm, 6mm, 6.5mm M35 HSS : High-speed steel with 5% cobalt for increased durability. Longer Life : Enhanced longevity compared to standard drill bits. Superior Performance : Effective for drilling stainless steel, high alloy steel, and acid-resistant metals. DIN338 : Conforms to standard specifications for consistency. 135° Split Point : Provides precise centring and reduces walking. Fully Ground : Ensures high accuracy and sharp cutting edges. Amber Finish : For improved visibility and identification. HRC 65-67 : High Rockwell hardness for durability. Brand : US Pro