20PCS S2 Steel Hex Bit Set, 1/4" Hex Shank Allen Drill Bits with Box
20PCS Set • S2 Alloy • Magnetic Heads
20PCS S2 Steel Hex Bit Set — Impact Allen Wrench Drill Bit Set
A heavy-duty hex bit kit engineered for precision and longevity. This 20PCS set includes both Metric and SAE sizes, CNC machined tips, magnetic heads and a torsion zone — ideal for impact drivers and demanding screwdriving tasks.
Product Overview
Upgrade your toolbox with our 20PCS Premium Hex Bit Set. Each bit is forged from high-quality S2 alloy steel and engineered to perform in both everyday and professional environments — from home repair to automotive work and electronics.
Key Features
- Complete 20PCS set — 10 SAE sizes and 10 Metric sizes to cover virtually every hex fastener need.
- S2 Tool Steel — Tempered at 350–800°F to reach Rockwell C 58–62 hardness for long life and toughness.
- Strong magnetic head — Holds screws securely for accurate placement; retains magnetism after repeated use.
- CNC machined tips — Precision tips with a negative tolerance of 0.2mm under international standards for an optimal fit and reduced cam-out.
- Torsion zone — Designed to absorb torque peaks and reduce breakage during heavy screwdriving; compatible with impact drivers.
- Includes 1/4" quick-release adapter — 2" long to reach into tight spots while maintaining a secure fit.
What’s in the Box
| Item | Sizes / Details |
|---|---|
| SAE Hex Bits (10) | 5/64”, 3/32”, 7/64”, 1/8”, 9/64”, 5/32”, 3/16”, 7/32”, 1/4”, 5/16” |
| Metric Hex Bits (10) | 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 5mm, 6mm, 7mm, 8mm |
| Quick-release adapter | 1/4” hex shank, 2" length (for tight access) |
| Storage | Organized box for easy transport and bit protection |
Technical Specifications
- Material: S2 alloy steel
- Hardness: Rockwell C 58–62
- Tempering range: 350–800°F
- Tip manufacturing: CNC machined with -0.2mm tolerance under international standards
- Compatibility: Standard 1/4" hex shank — works with drills, impact drivers, power screwdrivers
- Adapter length: 2" quick-release for tight spaces
Why Choose This Hex Bit Set?
Whether you’re a DIYer, mechanic, or professional tradesperson, this kit delivers:
- Reliability: S2 alloy and heat treatment for long service life under repeated torque.
- Precision: CNC tips reduce stripping and ensure a snug fit every time.
- Speed: Magnetic heads speed up screw placement and reduce dropped fasteners.
- Durability for impact work: Torsion zones and material choice make these bits suitable for impact drivers.
- Versatility: Metric + SAE coverage means fewer trips to the toolbox for the right size.
Recommended Applications
These hex bits are well suited for:
- Home repair and assembly (furniture, bed frames, fixt
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