Cobalt Twist Drill Set | High-Speed Steel for Metal & Stainless | M35 HSS

Engineered for the toughest drilling challenges, this cobalt HSS drill bit set excels in hard metals and stainless steel. The M35 cobalt alloy enhances heat resistance and maintains a sharp cutting ed...
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Questions about this product
- What materials can these cobalt bits drill?
- They're built for hard metals like stainless steel, cast iron and alloy steel. The M35 cobalt holds its edge in tough, high-tensile material far longer than plain HSS bits.
- What makes M35 cobalt better than regular HSS?
- M35 mixes about 5% cobalt into the steel, which boosts heat and wear resistance. That lets the bit run hotter and faster without dulling, so it lasts longer in hardened metal.
- Do I need cutting fluid when using these?
- For hard metals and stainless, cutting fluid or coolant is recommended. It pulls heat away and protects the edge. The 135-degree split point also helps the bit start cleanly without walking.
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