You save 2,500 (30%)
30% off the seller list price
Doorstep delivery by 21 Oct - 23 Oct from USA
Upgrade Your Toolkit for Tougher Jobs
GRENPRO's 22-piece hex shank drill bit set provides essential Metric (1.5-8mm) and SAE (5/64"-5/16") sizes, each 4 inches long with a 1/4" quick-release hex shank. These bits are designed for impact drivers, featuring a torsion zone to absorb torque peaks and extend life up to 15 times longer than standard bits. Imported from authorized US retailers, this set ensures high precision and durability for your projects.
Constructed from CNC-machined S2 alloy steel with a hardened core, these bits offer superior strength and fracture resistance. The Manganese Phosphate surface treatment, combined with an orange protective cover, provides double anti-rust protection. The strong magnetic tip accurately locks screws, making pickup easy and preventing magnetism decay over time, enhancing efficiency during heavy screw driving tasks.
Compared to local alternatives, GRENPRO bits offer enhanced durability and magnetic strength for demanding applications. All customs duties and GST are included in the listed price. Delivery is via ExpressBox, arriving with 12-14 days.
Engineered for Impact Drivers
GRENPRO hex shank bits are built for the high torque of impact drivers. Their S2 alloy steel construction and torsion zone design absorb stress, preventing breakage and extending bit life significantly compared to standard bits. This means fewer replacements and more reliable performance for demanding tasks, whether in automotive repair or home DIY projects.
Who It's For vs. Who Should Skip
Ideal for mechanics, DIY enthusiasts, and tradespeople who frequently use impact drivers for screw driving, assembly, or disassembly. Perfect for working with both Metric and SAE fasteners. Skip if you only own a standard drill with a keyed chuck and do not need impact-rated bits, or if you require bits for masonry or concrete drilling, as these are designed for screws and bolts.
Typical situations where GRENPRO Allen Wrench Drill Bit Set helps — illustrative scenarios, not customer reviews.
A mechanic in Chennai needs to service a car during monsoon season, requiring access to tight bolts and screws.
The GRENPRO 4-inch hex shank bits reach recessed areas. The rust-resistant coating protects against humidity, while the S2 alloy steel and impact rating ensure durability for tough automotive tasks. The magnetic tip prevents dropped screws in awkward positions.
A DIY enthusiast in Delhi is assembling furniture with both Metric and SAE fasteners and using an impact driver.
This GRENPRO set provides all necessary Metric (1.5-8mm) and SAE (5/64"-5/16") sizes. The impact-rated bits handle the driver's torque efficiently, and the precise CNC tips ensure accurate screw engagement, preventing stripped heads.
| Primary Material | S2 Alloy Steel |
| Coating | Manganese Phosphate |
| Tip Type | CNC Machined |
| Intended Use | Impact drivers, heavy screw driving, household maintenance, automotive, tool projects |
| Metric Sizes Included | 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 5mm, 6mm, 7mm, 8mm |
| SAE Sizes Included | 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16" |
| Shank Type | 1/4" Quick Release Hex Shank |
| Bit Length | 4 inches (10.16 cm) |
| Cost per use | 22 bits in set — ₹266 per bit |
| Shelf life after opening | 12 months (standard for tool accessories) |
| Reapplication math | N/A (durables) |
| Contraindications | Not for masonry or concrete drilling; not for standard drills without a compatible chuck. |
| Allergens / common irritants | None listed |
| Feature | GRENPRO Allen Wrench | Others |
|---|---|---|
| Material & Durability | S2 Alloy Steel, hardened core, torsion zone, 15x longer life expectancy | Varies by brand; often standard steel or lower-grade alloy, less impact resistance, shorter lifespan |
| Impact Driver Compatibility | Specifically designed for impact drivers, absorbs torque peaks | May be listed as 'impact ready' but often lack specialized torsion zones or S2 steel, leading to premature breakage |
| Magnetic Tip Strength | Strong, non-decaying magnetism for secure screw holding | Magnetism can be weaker or decay quickly, leading to dropped screws |
| Rust Resistance | Manganese Phosphate coating + protective cover for double anti-rust effect | Basic coatings or no coating, prone to rusting in humid Indian conditions |
| Metric & SAE Sizes | Comprehensive set: 10 Metric (1.5-8mm) + 10 SAE (5/64"-5/16") | Often offer only Metric or SAE, or a less balanced mix of sizes |
| SKU | zmt3092 |
| Brand | GRENPRO |
| Set Name | 22pcs Hex Bit Set |
| Item Name | Allen Wrench Drill Bit Set |
| Model Name/Number | 071047 |
| Material | S2 Alloy Steel |
| Finish Type | Manganese Phosphate Coated |
| Drive System | Internal Hex |
| Drive End Style | Hex Shank |
| Item Length | 4 inches (10.16 cm) |
| Shank Diameter | 1/4 inch (0.635 cm) |
| Number of Pieces | 22 |
| Bit Tip Configuration | Magnetic Tip |
| Compatible Fastener Description | Hex head (allen) bolts and screws, Metric & SAE sizes |
| Country of Origin | Not stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners |
About GRENPRO
GRENPRO specializes in high-quality tool accessories, focusing on durability and precision for professional and DIY users. Their range includes impact-rated bits and driver sets designed for demanding applications.
Compliance & Legal
No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging.
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This item:
GRENPRO Allen Wrench Drill Bit Set, 22PCS 4-Inch Metric & SAE Impact Bits | 1/4" Hex Shank for Impact Drivers
5,842
This item
GRENPRO Allen Wrench Drill Bit Set, 22PCS 4-Inch Metric & SAE Impact Bits | 1/4" Hex Shank for Impact Drivers
5,842
Total price:
9,929
You save 3,467 (26%) Extra3 items selected
3 items
9,929You save 3,467 (26%) Extra
| Attributes | Current |  |  |  |  |  |  |
|---|---|---|---|---|---|---|---|
| Spec | |||||||
| Price | 5,842 8,342 | 2,141 2,903 | 1,946 2,151 | 1,742 2,614 | 2,323 3,619 | 2,459 2,919 | 2,381 2,724 |
| Rating | 4.70(164) | 4.80(51) | 4.20(81) | 4.60(149) | 4.86(7) | 4.60(1,256) | 4.50(2,501) |
| Brand Name | GRENPRO | toolant | toolant | toolant | toolant | NEIKO | NEIKO |
| Source | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail |
| Sold By | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow |
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