I’m not sure but they are very soft metal and they strip very easily. I returned them. So if you’re trying to break free a tough screw these aren’t for you.

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Long Torx Security Head Screwdriver Drill Set 1/4 Inch Hex Shank T6 T7 T8 T9 T10 T15 T20 T25 T27 T30 T40 11 Pieces 4 Inch Length S2 Steel Torx Screwdriver Bit Set (11pcs Torx Head 100mm)

Long Torx Security Head Screwdriver Drill Set 1/4 Inch Hex Shank T6 T7 T8 T9 T10 T15 T20 T25 T27 T30 T40 11 Pieces 4 Inch Length S2 Steel Torx Screwdriver Bit Set (11pcs Torx Head 100mm)

Q: Are these bits designed to be used in an impact driver?

Hello, These bits are not designed to be used in impact dirver. They are mainly used to tighten screws, and using specialized screwdrivers would be better. Impact drills are used for drilling holes, and improper use may damage tools or cause other problems. I hope this answer is helpful to you.

Q: How do i know the bits i just received are "made of s2 high quality shock-resisting tool steel"? the bits i received are not stamped "s2".

Dear,don't worry about that. Different batches may have small different places in package or logos.But the materials and quality are the same.Please rest assured purchase.

Q: Is the T15 long enough to open a Parmak 8 electric fence charger?

I'm not familiar with the fence charger but i would say that they are. If you are able to seethe fasteners with out using a light source then you should be okay

Product ID: 128228172

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Details

Brand
YDLQWCZ
Item Length
4 Inches
Material
Alloy Steel S2
Drive System
Star / Hex
Finish Type
Steel

🔩11 precision Torx sizes

⚙️S2 shock-resistant steel

🛠️4-inch long 1/4" hex shank

Description

🔧 Elevate your toolkit with precision, power, and pro-level performance!

FLAWLESS FIT FINISH - Exquisite workmanship ensures every edge locks screws tightly without damage—your go-to for tamper-proof tasks.
COMPLETE PRECISION SET - 11 professional Torx security bits from T6 to T40, clearly engraved for instant size recognition.
UNIVERSAL COMPATIBILITY - Fits all standard 1/4" hex shank holders—perfect for electric drills, manual screwdrivers, and air tools.
DURABLE S 2 STEEL CONSTRUCTION - Crafted from premium shock-resistant S2 alloy steel for unmatched strength and abrasion resistance.
MAGNETIZABLE HEADS FOR EFFORTLESS HANDLING - Easily magnetize bits to securely hold screws, reducing drops and speeding up your workflow.

This 11-piece Long Torx Security Head Screwdriver Drill Set features sizes T6 through T40 with 4-inch 1/4" hex shanks made from durable S2 shock-resistant steel. Designed for compatibility with electric and manual screwdrivers, the magnetizable heads improve screw retention, while engraved sizes and expert craftsmanship ensure precision and reliability for professional and DIY projects alike.

Specifications

Brand	YDLQWCZ
Item Length	4 Inches
Material	Alloy Steel, S2 Steel
Drive System	Star / Hex
Finish Type	Steel
Number of Pieces	11
Drive Bit Shank Style	Hex
UPC	192389839750
Manufacturer	Lerom
Part Number	HU-XI-201
Item Weight	6.7 ounces
Size	11pcs Torx Head(100mm))
Finish	Steel
Item Package Quantity	1
Compatible Fastener Range	0.25 inch
Batteries Included?	No
Batteries Required?	No