Cobalt Drill Bit Set | HSS-Co Straight Shank | For Stainless Steel, Iron & Woodworking

Engineered for extreme durability, this M35 Cobalt HSS drill bit set tackles the toughest materials with ease. The 5% cobalt alloy and 135-degree split point design ensure faster penetration, reduced ...
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Questions about this product
- What materials can these cobalt drill bits actually cut?
- They're built for tough metals like stainless steel, cast iron, and hardened steel, and they handle wood too. The M35 cobalt steel holds an edge under heat where regular HSS bits dull fast. The 135-degree split point starts cleanly without wandering.
- Will these fit my regular drill chuck?
- Yes. They use a straight cylindrical shank that grips in any standard three-jaw chuck, including high-torque industrial drills. The shank is held to a tight h6 tolerance for a snug, low-runout fit. No special adapter is needed.
- How do I keep these bits sharp when drilling stainless?
- Run them at slower speeds with steady pressure and use cutting fluid on stainless and hard steel. That clears heat so the cobalt edge lasts longer. The spiral flutes pull chips out, but pause to clear them on deep holes so the bit doesn't overheat.
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