Step Cone Drill Bit Set – 4-12, 4-20 & 4-32mm Steel Cutter

Coated Steel Step Cone Drill Bit – Multi-Size Hole Cutter for Wood, Metal & Plastic

Tackle a wide range of drilling tasks with this versatile Step Cone Drill Bit. Made from high-quality steel with a friction-reducing golden coating, this bit delivers fast, smooth, and clean cuts across multiple hole sizes — all in a single tool. Whether you're working on sheet metal, wood, plastic, or brass, this step drill bit replaces an entire set of standard bits.

Key Features

• Premium Steel Construction: Built for durability and long-lasting performance across repeated use.
• Friction-Reducing Coating: Golden finish minimises heat build-up and wear, extending the life of the bit.
• Two-Flute Design: Dual flutes cut faster and cleaner, producing smooth, burr-free holes with minimal effort.
• Clearly Labelled Steps: Each step is engraved with its diameter for quick, accurate hole sizing — no guesswork needed.
• Three Size Options: Choose from 4–12mm, 4–20mm, or 4–32mm to suit your project requirements.
• Versatile Material Compatibility: Ideal for steel, brass, aluminium, wood, plastic, and more.

Specifications

Usage Tips

• For hand drills, use on metal plates no thicker than 3mm. For metal plates 3–5mm thick, use only with a stabilised (press) drill.
• Apply adequate water cooling while drilling metal to prevent overheating and extend the life of the bit.
• Use a slow, consistent speed for best results — let the bit do the work.

Package Contents

• 1 × Step Cone Drill Bit (your choice of 4–12mm, 4–20mm, or 4–32mm)

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For guidance on safe power tool use, visit the OSHA Power Tools Safety Resource. For consumer product safety standards, refer to the U.S. Consumer Product Safety Commission (CPSC).

Note: Actual product colour may vary slightly from images due to monitor settings and lighting. Please allow minor measurement tolerances of ±1–2mm.

Learn more: Drill bit

Frequently Asked Questions

Q: What materials can this step cone drill bit cut through?

A: This step cone drill bit is designed to cut through a wide variety of materials, including steel, brass, aluminium, wood, and plastic. For best results on harder metals, use with water cooling and a stabilised drill press.

Q: What drill sizes are included within each step drill bit?

A: Each bit covers a range of hole diameters in 2mm increments: the 4–12mm bit covers 4, 6, 8, 10, and 12mm; the 4–20mm bit covers 4 through 20mm; and the 4–32mm bit covers 4 through 32mm — giving you up to 15 different hole sizes in a single tool.

Q: Can I use this step drill bit with a standard hand drill?

A: Yes — this bit is compatible with standard hand drills for lighter materials and thin sheet metal (up to 3mm). For thicker metal (3–5mm), a stabilised drill press is recommended for safe, accurate results.

Q: Why does the bit have a golden coating?

A: The golden coating serves as a friction-reducing finish that minimises heat build-up during drilling. This helps extend the working life of the bit and produces cleaner, smoother holes with less effort.