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

SLADE 3-Piece HSS Titanium Coated Step Drill Bit Set

Tackle any drilling job with confidence using this professional-grade set of three titanium-coated High Speed Steel (HSS) step drill bits from SLADE. Whether you're cutting clean holes in sheet metal, wood, plastic, brass, or PVC, these cone-style step bits deliver fast, accurate, and burr-free results every time. The kit includes three versatile sizes — 3-12mm, 4-12mm, and 4-20mm — making it a true all-in-one solution for DIYers and tradespeople alike.

Made in Mainland China.

Why Choose This Step Drill Bit Set?

• Titanium Coating: Reduces friction, minimises heat build-up, and dramatically extends bit life compared to uncoated HSS bits.
• Premium HSS Construction: Heat-treated, highly polished High Speed Steel ensures perfectly round, clean holes on every pass.
• 3-Sided Anti-Slip Shank: The triangular shank locks firmly into your drill chuck, eliminating dangerous slippage during use.
• Dual-Flute Design: Drives faster, smoother, and cleaner cuts — each step is clearly laser-etched with its diameter for at-a-glance reference.
• Wide Material Compatibility: Ideal for steel, brass, wood, plastic, PVC, and iron plate (up to 3mm thickness). Note: Not suitable for stainless steel, spring steel, or hardened/quenched materials.
• Multi-Function: Perfect for deburring, chamfering, cutting, or enlarging existing holes.

Compatible Drilling Tools

Works with pistol drills, hand drills, cordless drills, and bench drills. Tip: Use water injection cooling during continuous drilling to extend bit life significantly.

Specifications

Usage Tips for Best Results

• Apply steady, controlled downward pressure — avoid pressing too hard to prevent edge wear.
• Use the recommended RPM range for each bit size to prevent overheating.
• Apply cutting fluid or water cooling during extended or continuous drilling sessions.
• Suitable for workpieces of general hardness only; do not use on stainless steel, spring steel, or quenched materials.

What's in the Box

• 1× Step Drill Bit 3–12mm (10 steps)
• 1× Step Drill Bit 4–12mm (5 steps)
• 1× Step Drill Bit 4–20mm (9 steps)

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For guidance on safe power tool usage and workshop safety best practices, visit the OSHA Power Tools Safety Resource.

Learn more: Drill bit

Frequently Asked Questions

Q: What materials can I use these HSS titanium step drill bits on?

A: These step drill bits are designed for general-hardness materials including steel sheet, brass, wood, plastic, PVC plate, and iron plate up to 3mm thick. They are not suitable for stainless steel, spring steel, or any hardened/quenched material, as the cutting edge may wear prematurely on these harder surfaces.

Q: What drill speed (RPM) should I use for each step drill bit?

A: For the 3–12mm and 4–12mm bits, use a drill speed of 260–400 RPM for optimal performance. For the larger 4–20mm bit, reduce the speed to 180–240 RPM, as the larger diameters create more cutting resistance and heat at higher speeds.

Q: How do I prevent the step drill bit from overheating during use?

A: Apply water or cutting fluid as a coolant during continuous or heavy drilling sessions. Avoid pressing down too hard — use steady, controlled pressure. The titanium coating helps reduce heat build-up, but cooling is especially important when drilling multiple holes in succession.

Q: Are these step drill bits compatible with standard drill chucks?

A: Yes. The 3-sided (triangular) anti-slip shank design is compatible with standard pistol drills, hand drills, cordless/charging drills, and bench drills. The triangular shank also prevents the bit from rotating or slipping in the chuck during use.