15Piece M35 Cobalt Drill Bit Set,Professional HSS Twist Drills Metal drilling kit For Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper, 1MM 7MM in Box

Built for Hard Steel – M35 Cobalt Strength: Made from premium M35 cobalt high-speed steel (5% cobalt), delivering HRC 63–66 hardness and superior heat resistance. Cuts through stainless steel, alloy steel, and other tough metals without dulling or overheating. 135° Split Point – No Walking, Faster Starts: Self-centering 135° split point tip prevents slipping on metal surfaces. Drill accurately without pilot holes, saving time while producing clean, precise holes in hard materials. One Set, Multiple Materials: Designed for stainless steel, cast iron, alloy steel, and titanium, while also handling aluminum, copper, plastic, and wood with ease. A true all-purpose drill bit set for home, workshop, or jobsite use. Multiple Size Sets – Choose What You Need: Available in 5 to 27 piece sets, covering sizes from 1mm to 13mm. Select sets include duplicate sizes for high-wear bits (like 5mm, 6mm, 8mm), giving you longer usability and fewer interruptions. Durable Design – Smooth, Cooler Drilling: Fully ground twist design with dual flutes ensures fast chip removal, reducing heat and friction. Hardened through high-temperature quenching for long-lasting performance. Packed in a sturdy storage case for easy organization.