Alpha
Alpha Thundermax Step Drill Set — 3 Piece
Part No: SM3SDTP-B | Barcode: 9313601025251 | Range: Onsite+
The Alpha Thundermax Step Drill Set provides three versatile step drills covering a wide range of hole sizes. Featuring the Onsite+ composite Z-cut design and AlTiN coating, this set delivers fast, clean cuts through steel and stainless steel with up to 3x the efficiency of standard step drills.
3pc Set
Composite Z-Cut
AlTiN Coated
3x Lifespan
Step Tip
Suitable For
Stainless Steel
Mild Steel
Wood
Plastic
Key Features & Benefits
- Thundermax 3-piece coverage — three step drills covering multiple size ranges for versatile hole-making capability.
- Composite Z-cut technology — two cutting edges per step aggressively remove metal and clear chips for faster, cleaner cuts.
- AlTiN coating — extreme temperature resistance for sustained performance in demanding materials.
- Patented step tip — eliminates pilot holes and wandering for precise, burr-free starts every time.
- 3x efficiency and lifespan — outperforms standard step drills in cutting speed and service life.
When to Use This Set
The SM3SDTP-B Thundermax Set is an excellent value entry point into the Alpha Onsite+ step drill range. With three drills covering multiple size ranges, it handles a wide variety of hole sizes for general metalwork, electrical, and plumbing tasks. For dedicated straight-shank or hex-shank sets, see the Tuffbox options below.
Authorised Australian Dealer — This product is sourced directly from Alpha Tools Australia and is backed by full Australian manufacturer warranty and local support.
Product Specifications
| Part No. | Type | Size Range | Shank |
|---|---|---|---|
| 9STM4-M12DSD | Step Drill | 3.3–10.2mm | Straight |
| 9STM4-12DSD | Step Drill | 4–12mm | Straight |
| 9STM8-20DSD | Step Drill | 8–20mm | Straight |
| 9STM9-19DSD | Step Drill | 9–19mm | Straight |
| 9STQRM4-12SD | Step Drill SF | 4–12mm | ¼″ Hex |
| 9STQRM4-20SD | Step Drill SF | 4–20mm | ¼″ Hex |
| 9STQRM6-30SD | Step Drill SF | 6–30mm | ¼″ Hex |
| SM3SDTP-B ★ | Thundermax Set | 3pc Set | Mixed |
| SM3STDSD-B | Tuffbox Set | 3pc Set | Straight |
| SM3STQRSD-B | Tuffbox Set | 3pc Set | ¼″ Hex |
★ You are viewing the highlighted variant. Other sizes in this series are also available.
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