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 Grabit Pro Broken Bolt and Damaged Screw Extractor 4 Piece Kit

Alden 8440P Grabit Pro Broken Bolt and Damaged Screw Extractor 4 Piece Kit

Product ID: 280159124

Details

Brand
Alden
Cutting diameter
10 Millimeters
Finish type
Black Oxide
Material
High Speed
Shank type
Square

🎯Self-centering tip for precision

⚙️Dual-step drill & extractor combo

🛠️Tempered twice for extra hardness

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Description

🛠️ Unlock stuck screws like a pro—because broken bolts don’t stand a chance!

VERSATILE SIZE RANGE - Handles screws #4 to #24 and bolts up to 3/8"—all your stuck fasteners covered.
BUILT TO LAST WITH M 2 HSS - Twice-tempered, USA-made steel ensures multiple extractions per bit without fail.
TWO STEP EXTRACTION MASTERY - Drill & extract in one seamless motion—no extra tools needed.
PRECISION SELF CENTERING TIP - Eliminates walking or wandering for flawless screw targeting every time.
QUICK CHANGE CHUCK COMPATIBLE - Fits effortlessly into your drill for fast, hassle-free operation.

The Alden 8440P Grabit Pro is a premium 4-piece extractor kit featuring dual-ended bits with burnishing and threaded tips for efficient removal of broken or damaged screws and bolts up to 3/8". Made from twice-tempered M2 high-speed steel in the USA, it offers precision self-centering tips that prevent drill wandering and fits quick-change chucks for easy use. Designed for professionals and DIYers alike, it covers a wide range of screw sizes and types, delivering reliable, multiple extractions per tool.

Specifications

ASIN	B001A4CWHO
ASIN	B001A4CWHO
Best Sellers Rank	#12,744 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Tap Extractors
Brand Name	Alden
Customer Reviews	4.2 4.2 out of 5 stars (1,342)
Customer reviews	4.2 4.2 out of 5 stars (1,342)
Cutting Diameter	10 Millimeters
Date First Available	10 August 2012
Finish Types	Black Oxide
Global Trade Identification Number	00727708084407
Included Components	Plastic case & 4 Professional Extractor Bits
Is Discontinued By Manufacturer	No
Item Dimensions	20.3 x 10.2 x 2.5 centimeters
Item Length	10.5 Centimeters
Item model number	8440P
Manufacturer	Alden
Manufacturer	Alden
Material Type	High Speed Steel (HSS)
Minimum Bore Diameter	0.19 Inches
Model	8440P
Number of Pieces	4
Part Number	8440P
Point Style	Center Point
Product Dimensions	20.32 x 10.16 x 2.54 cm; 100 g
Set Name	Alden 8440P Pro Grabit Broken Bolt and Damaged Screw Extractor 4 Piece Kit
Shank Type	Square
Surface Recommendation	Metal, Steel
Tool Flute Type	Straight
UPC	786830337782 795871624188 744211231548 727708084407
Unit Count	4 Count

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฿4293

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered 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 Thailand.

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