will these work on 1/4" corroded stainless steel screws?

I just tried to use them to remove some 1/4-20 stainless flat head screws that were corroded into a piece of aluminum. The #2 tool, which is spec'd for 1/4" fasteners, broke with very little effort. Since the heads were big enough, I then tried to use the #4 tool, which is supposedly strong enough to remove 3/8" fasteners, and it broke too. I don't expect miracles from these tools but I do expect that they would strip the fastener head before breaking themselves. I consider this a design flaw and would not recommend them for really tough jobs.

I can't figure out what grade bolts are for license plates. I have 4 of them with broken heads. Is this kit strong enough?

license plate bolts should not be any heavier than grade 4These extractors are the greatest, I removed broken steel bolts that the head had stripped out-follow the instructionsthey are amazing!!!!

Need this to take the bolts out from my fender. Is this strong enough?

They should be strong enough, I have never had a problem with any of the Grabit products. I have used it to pull out stripped bolts off my old motorcycle.

I have an interior threaded pipe I need to remove that is th edrain for my air compressor. I snapped it off. It's inside diameter 5/16".

5/16 is too large for these, a standard extractor is tapered it's entire length, these aren't.

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Alden 8440P Pro Grabit Broken Bolt and Damaged Screw Extractor 4 Piece Kit - Made in the USA

Product ID: 4353144

Details

Brand
ALDEN
Drive System
Phillips Hex
Finish Type
Steel
Item Length
4 inches
Number of Pieces
4

🔄Self-centering tip, no prep needed

🛠️2-step drill & extractor combo

🇺🇸Made in USA, premium M2 HSS steel

AR$148724

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Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Extract with confidence — never let a broken bolt slow you down!

BUILT TO LAST - Crafted from high-grade M2 High-Speed Steel and proudly made in the USA for unmatched durability and performance.
EFFORTLESS ACCURACY - Self-centering drill tip prevents wandering, so you get perfect alignment every time without grinding or punching.
LIFETIME CONFIDENCE - Backed by Alden’s Lifetime Warranty, ensuring your investment is protected against defects for life.
DUAL ACTION PRECISION - Two-step drill and extractor in one tool eliminates the need for multiple tools, streamlining your workflow.
UNIVERSAL COMPATIBILITY - Works seamlessly with all common drive bit styles including Phillips, Hex, Torx, and more—your go-to for any stripped fastener.

The Alden 8440P Pro Grabit Kit is a professional-grade 4-piece extractor set designed to remove broken bolts and damaged screws effortlessly. Featuring a unique two-step drill and extractor combo with a self-centering tip, it requires no bolt prep or grinding. Made from premium M2 High-Speed Steel in the USA, it offers durability backed by a lifetime warranty, making it an essential tool for any serious DIYer or professional.

Specifications

ASIN	B001A4CWHO
Best Sellers Rank	#65,991 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #84 in Tap Extractors
Bit Compatibilities	drill
Bit Set Composition	Bit Set
Brand Name	ALDEN
Customer Reviews	4.2 4.2 out of 5 stars (1,481)
Drive Bit Application	metalworking
Drive Bit Shank Style	cylindrical
Drive System	Phillips, Slotted, Hex, Torx, Tri-Wing, Pozidriv, Frearson
Finish Types	Steel
Global Trade Identification Number	00727708084407
Included Components	Plastic Case
Item Length	4 inches
Manufacturer	Alden
Manufacturer Part Number	8440P
Manufacturer Warranty Description	90 day limited warranty.
Model Number	8440P
Number of Items	1
Number of Packs	1
Number of Pieces	4
Set Name	Alden 8440P Pro Grabit Broken Bolt and Damaged Screw Extractor 4 Piece Kit
UPC	786830337782 795871624188 744211231548 727708084407
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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AR$148724

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Argentina.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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