HSS Step Drill Bit 4–42mm | 14-Step Cone for Metal & Wood
HSS Step Drill Bit 4–42mm | 14-Step Cone for Metal & Wood
DAZZLEEX HSS Step Cone Drill Bit – 4–42mm, 14 Steps
Tackle any drilling project with precision using this professional-grade High Speed Steel (HSS) Step Cone Drill Bit. Covering 14 graduated diameters from 4 mm all the way to 42 mm, this single bit replaces an entire set of standard twist drills — saving you time, space, and money. Whether you're working with sheet metal, brass, wood, or plastic, the coated cone design delivers clean, burr-free holes every time.
Key Features
- 14-Step Design: Sizes 4 – 6 – 9 – 12 – 15 – 18 – 21 – 24 – 27 – 30 – 33 – 36 – 39 – 42 mm — one bit for virtually every hole size you need.
- High Speed Steel (HSS 4241): Engineered for durability and long service life across tough materials including steel, brass, wood, and plastic.
- Protective Coating: The coated surface reduces friction, dissipates heat, and extends the working life of the cutting edges.
- Round Shank (9.5 mm diameter): Fits securely into standard drill chucks and power drills with no slipping.
- Compact Length (≈99 mm): Easy to handle in tight spaces while providing excellent stability during drilling.
- Versatile Material Compatibility: Suitable for steel, aluminum, brass, copper, wood, plastic, and other common workpiece materials.
- Clean Hole Entry: The stepped cone geometry self-centers and progressively widens the hole, eliminating the need for pilot holes in most applications.
Specifications
| Model | 4–42mm (14 Steps) |
| Step Sizes | 4, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42 mm |
| Material | High Speed Steel (HSS 4241) |
| Shank Type | Round, 9.5 mm diameter |
| Overall Length | Approx. 99 mm |
| Surface Finish | Coated (anti-friction) |
| Country of Origin | Made in China |
Package Contents
- 1 × HSS Step Cone Drill Bit (4–42 mm, 14 Steps)
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Note: Monitor calibration and lighting conditions may cause slight colour variation from product images. Please allow a minor measurement tolerance of ±1 mm for all listed dimensions.
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Frequently Asked Questions
Q: What materials can the 4–42mm HSS step drill bit cut through?
A: This HSS step cone drill bit is designed for use on a wide range of materials, including mild steel, stainless steel, aluminum, brass, copper, wood, and plastic. The HSS 4241 construction and anti-friction coating make it suitable for both metalworking and woodworking applications.
Q: Do I need a pilot hole before using this step drill bit?
A: No. The pointed tip and graduated step cone geometry allow the bit to self-center and start drilling without a separate pilot hole in most sheet and thin-stock materials, making the process faster and more convenient.
Q: Will this step drill bit fit my standard power drill?
A: Yes. The 9.5 mm round shank is compatible with most standard keyless and keyed drill chucks found on corded and cordless power drills. Make sure your chuck can accommodate a 9.5 mm (3/8 in) shank before purchase.
Q: How many different hole sizes can I drill with this single bit?
A: This single bit provides 14 distinct hole sizes: 4, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, and 42 mm — effectively replacing a large assortment of individual drill bits.
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.