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

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 durability

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11195 kr

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Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Extract Like a Pro — Don’t Let Broken Bolts Slow You Down!

BUILT TO LAST - Tempered twice and crafted from premium M2 High-Speed Steel for multiple extractions per bit.
MADE IN THE USA - Proudly manufactured with the highest quality steel, delivering professional-grade reliability.
TWO IN ONE POWER - Drill and extract broken bolts & screws with a single tool—no extra bits needed.
PRECISION PERFECT - Self-centering drill tip eliminates walking, ensuring flawless alignment every time.
VERSATILE SIZE RANGE - Four dual-ended bits cover screws from No. 4 to No. 24 and bolts up to 3/8", handling all your toughest jobs.

The Alden 8440P Grabit Pro Kit features four dual-ended, M2 HSS extractor bits with a unique two-step design combining drilling and extraction. Its self-centering tips prevent walking, while double tempering ensures durability for multiple uses. Designed for screws No. 4 to No. 24 and bolts up to 3/8", this USA-made kit offers professional-grade precision and versatility in a compact, easy-to-use set.

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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