Drill Bits Suitable For Drilling Into Hardened Steel - UK Drills

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Email: [email protected] Phone: 01942 523 627 UK Drills
  • Drill Bits
  • Bi Metal Hole Saws
  • Core Drills
  • Cutting & Grinding Discs
  • Drill Sets
  • Jig Saw Blades
  • Screwdriver Bits
  • Taps and Dies
Shopping CartMy Cart - 0 £0.00 Your Cart × Search
  • Drill Bits
  • Bi Metal Hole Saws
  • Core Drills
  • Cutting & Grinding Discs
  • Drill Sets
  • Jig Saw Blades
  • Screwdriver Bits
  • Taps and Dies

Our warehouse situated in Wigan, houses over 1,000,000 drill bits ready for same day dispatch nationwide!

A family business, we have been trading and specialising in drill bits since 1985

We focus on quality and our reviews fully support this with a 4.7* rating on Reviews.io

Our warehouse situated in Wigan, houses over 1,000,000 drill bits ready for same day dispatch nationwide!

Hardened Steel Hardened Steel

Unsure What You’re Up Against?

If you're not sure how hard the steel is, start with cobalt. If that fails, step up to TCT. And as always - if in doubt, ask us.

HSS & Cobalt

Cobalt drill bits are the best all-round choice for hardened or stainless steels. Made with 5% cobalt alloy for high heat resistance and longer edge retention. Run slow, use steady pressure, and keep the bit cool for best results. HSS drill bits are not recommended for hardened steel - most will burn out or fail quickly. Only use on very light-duty work or if drilling into already-softened edges.

TCT

Tungsten carbide-tipped bits for when cobalt isn’t enough. Ideal for extreme materials like high-tensile fasteners, hardened bolts, and heavy-duty security plates. Often used by locksmiths, fabricators, and engineers. Requires precision and care.

HELP - Want to know the difference between SDS plus and SDS max, watch our short video below to ensure you pick the correct drill bit!

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