Four Spiral Flute Step Drill Bit Set
Four Spiral Flute Step Drill Bit Set
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Four Spiral Flute Step Drill Bit Set
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The Four Spiral Flute Step Drill Bit Set is an outstanding addition to any workshop toolbox—engineered for precision and efficiency in metal, wood, plastic, and composite drilling. With four spiral flutes, this step drill bit design ejects chips quickly while maintaining consistent contact with material surfaces, producing clean holes with minimal burrs. The set covers a broad range of hole diameters, reducing the need for multiple bits and enabling fast size progression during drilling.
🔥 Description
🔥 Description
The Four Spiral Flute Step Drill Bit Set is a spiral groove step drilling solution designed to cut holes ranging from small pilot sizes to larger diameters without bit changes. Each bit features four spiral flutes that improve chip removal and reduce heat buildup, supporting smoother drilling and longer service life.
SPECIFICATIONS:
- Product Type: Four Spiral Flute Step Drill Bit Set
- Material: High-Speed Steel (HSS)
- Flute Design: Spiral (4-flute)
- Shank Size: 3/8 inch
- Drill Range: 1/8" to 1-3/8" (approximately 3.175 mm to 34.925 mm)
- Number of Bits: 5
- Compatibility: Corded or cordless drills with 3/8" chuck
- Storage: Included case
What's Included:
✔️ 5 Pieces of Four Spiral Flute Step Drill Bits
✔️ Size Range per Bit: 1/8" – 1-3/8"
✔️ Standard 3/8" shank for compatibility with most drill chucks
✔️ High-speed steel construction
✔️ Protective storage case
💕 Confidence in Guarantee™
💕 Confidence in Guarantee™
We’re confident you’ll love Selgra's performance — and back it up with:
- 30-day satisfaction guarantee — if you’re not completely happy with how the tray works, return it for a full refund.
- 12-month manufacturer warranty — covers defects in material or workmanship. Buy with peace of mind.
💕 How to Use
💕 How to Use
- Select the Correct Bit: Match the desired final hole diameter with the corresponding bit step on the selected drill bit.
- Secure Workpiece: Clamp or securely hold the material to prevent movement.
- Mount Bit: Insert the bit into your drill’s chuck and tighten firmly.
- Drill at Moderate Speed: Start drilling at a slow-to-moderate speed and maintain firm, steady pressure.
- Progress Through Steps: Allow the bit to cut through each incremental step until the final size is reached.
- Cool and Clean: Withdraw periodically to clear chips; use lubricant for metal drilling to enhance bit life.
See why people can’t get enough of Drill Bit Set
🔄 Four Spiral Flutes
Four precision-cut spiral flutes actively eject chips while drilling, delivering smoother cuts, cleaner holes, and reduced binding even in tougher materials.
🔥 High-Speed Steel Construction
The reverse spiral flute design bites tightly into stripped or rounded fasteners, increasing grip as you turn for confident, controlled removal.
🔧 Loved by Professionals, Trusted for Performance
96%
of users reported cleaner, more precise holes with reduced burrs
93%
experienced smoother drilling action and improved chip removal
89%
saw consistent hole sizing, reduced binding, and faster job completion
Results based on 90-day real-world workshop and job-site usage.
Your Last Step Drill Bit Set. Ever. 🔧
This complete Four Spiral Flute Step Drill Bit Set gives you everything you need to drill clean, precise holes without switching bits. Engineered with four spiral flutes for smooth chip removal and built from high-speed steel for lasting durability, it delivers consistent performance across metal, wood, plastic, and sheet materials. From pilot holes to larger diameters, every step cuts with control and efficiency—saving time, reducing binding, and producing professional results every time. Whether you're working in the shop, on-site, or tackling DIY projects, this set is designed to keep up with every job you throw at it.
| Selgra | Others | |
|---|---|---|
| Four Spiral Flutes | ||
| Wide Drill Range | ||
| High-Speed Steel Construction | ||
| Single Bit Multi-Size Capability | ||
| Standard Shank Compatibility | ||
| Protective Storage Case |
Testimonials
FAQ
What materials can this step drill bit set work on?
What materials can this step drill bit set work on?
These bits are designed to drill through metal, wood, plastic, and thin sheet materials.
What is the purpose of the four spiral flutes?
What is the purpose of the four spiral flutes?
The four spiral flutes assist in efficient chip removal and reduced friction, improving drilling speed and surface finish.
Will this set fit standard handheld drills?
Will this set fit standard handheld drills?
Yes—the set uses a standard 3/8" shank, compatible with most handheld and bench drills.
Does the set include metric measurements?
Does the set include metric measurements?
The primary sizing is in inches (1/8" to 1-3/8"), which equates to approximately 3.175 mm up to 34.925 mm.
How should I maintain the bits for long life?
How should I maintain the bits for long life?
Clean chips frequently, avoid excessive speed and pressure, and use a cutting lubricant when drilling metals.
How long does delivery take?
How long does delivery take?
Standard delivery typically takes 7-8 business days, while expedited shipping options can deliver in 2-3 business days. Delivery times may vary based on your location.
What if my order arrives damaged or incomplete?
What if my order arrives damaged or incomplete?
Please contact our customer service team immediately if your order arrives damaged or incomplete. We will provide a replacement or work to resolve the issue as quickly as possible.