Alpha
Alpha Onsite+ Step Tip Step Drill Tuffbox Set — 3 Piece ¼″ Hex Shank
Part No: SM3STQRSD-B | Barcode: 9313601027286 | Range: Onsite+
The Alpha Onsite+ Step Drill Tuffbox Set brings together three essential hex-shank step drills in a durable carry case, covering hole sizes from 4mm to 30mm. Each drill features Alpha’s patented composite Z-cut technology with two cutting edges per step, AlTiN coating for extreme temperature resistance, and the step tip design that eliminates pre-drilling entirely.
3pc Set
4–30mm Coverage
¼″ Hex Shank
Composite Z-Cut
AlTiN Coated
Tuffbox Case
Suitable For
Stainless Steel
Mild Steel
Wood
Plastic
Key Features & Benefits
- Complete 3-piece coverage — three step drills cover 4–12mm, 4–20mm, and 6–30mm for virtually every common hole size in one convenient set.
- ¼″ quick-release hex shanks — all three drills fit cordless impact drivers and quick-change chucks for rapid bit swaps onsite.
- Durable Tuffbox carry case — heavy-duty storage protects the cutting edges in transit and keeps the set organised on the job site.
- 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 stainless steel and hardened materials.
- Patented step tip design — eliminates pilot holes and wandering for precise, burr-free starts every time.
When to Use This Set
The SM3STQRSD-B Tuffbox Set is the ideal starting kit for tradies who want the complete Alpha Onsite+ step drill experience with hex shanks. With three drills covering 4–30mm, this set handles everything from small pilot-free holes for screws and rivets through to large openings for conduit and fittings. The Tuffbox case keeps the set protected and ready to grab when heading to a job. For straight-shank versions compatible with drill presses, see the SM3STDSD-B set.
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 and types in this series are also available.
Reviews
There are no reviews yet.