Titanium HSS Step Drill Bit Set – 3-12mm, 4-12mm, 4-20mm

Take your drilling projects to the next level with these Titanium-Coated High-Speed Steel (HSS) Step Drill Bits. Available in three versatile size ranges — 3–12mm, 4–12mm, and 4–20mm — this set is engineered for clean, precise stepped holes in a wide variety of materials. Whether you're a weekend DIYer or a seasoned tradesperson, these step drill bits deliver professional-grade performance at an accessible price.

Why Choose These Step Drill Bits?

• Titanium-Coated Finish: The titanium surface treatment significantly extends bit life, reduces friction, and keeps cutting edges sharper for longer compared to uncoated bits.
• High-Speed Steel 4241 Construction: Made from HSS 4241, these bits offer excellent hardness and durability for use on workpieces with a hardness below 25° — including wood, thin iron plates, aluminum, brass, PVC boards, and insulation boards up to 4mm thick.
• Spiral Groove Design: The spiral flute geometry provides superior chip removal, better guidance through the material, and smoother, cleaner cuts compared to straight-groove alternatives.
• Hexagon Shank: The hex shank ensures a secure, slip-free grip in any standard power drill or drill press chuck.
• Multi-Purpose Use: Ideal for deburring, chamfering, and enlarging holes in sheet metal, steel plate, aluminum plate, brass, and wooden boards.
• CE Certified: Meets CE quality and safety standards for your confidence and peace of mind.

Specifications

• Material: High-Speed Steel (HSS 4241)
• Surface Treatment: Titanium Coated
• Head Type: Hexagon Shank
• Type: Step / Cone Drill Bit
• Size Options: 3–12mm | 4–12mm | 4–20mm
• Suitable Material Hardness: Below 25° (wood, thin metals, PVC, insulation board)
• Certification: CE
• Country of Origin: Made in China

What's in the Box?

• 1 × Titanium-Coated HSS Step Drill Bit (your chosen size)

Perfect Pairings for Your Workshop

Complete your toolkit with these related accessories from our store:

• Screw Extractor Drill Bit Set 5 & 6 Pc – Carbon Steel — perfect companion for tackling stripped or stuck fasteners.
• 10-Pack Silicone Cable Ties – Reusable Cord Organizers — keep your workshop cables tidy and safely managed.
• Adjustable Label Roll Holder – 3D Printed Thermal Printer Stand — organize your workspace labels and printed project notes with ease.

Learn more: OSHA on eye and face protection

Frequently Asked Questions

Q: What materials can these titanium-coated HSS step drill bits cut through?

A: These step drill bits are designed for materials with a hardness below 25°, including thin iron sheets, aluminum plates, brass, wooden boards, PVC boards, and insulation boards up to 4mm thick. They are not recommended for hardened steel or stainless steel.

Q: What is the advantage of the spiral groove design on these step drill bits?

A: The spiral groove (flute) design provides significantly better chip evacuation than straight-groove step bits, resulting in smoother cuts, improved guidance during drilling, and reduced heat build-up — which helps extend the life of the bit.

Q: Which size step drill bit should I choose — 3–12mm, 4–12mm, or 4–20mm?

A: Choose based on the hole sizes you need: the 3–12mm bit is great for smaller precision holes, the 4–12mm covers standard light-duty tasks, and the 4–20mm is ideal when you need larger diameter holes in sheet metal, wood, or plastic panels.

Q: Are these step drill bits compatible with standard power drills?

A: Yes. All bits feature a hexagon (hex) shank that fits securely into standard power drills, cordless drills, and drill presses, preventing slipping during operation for safer and more accurate drilling.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.