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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Description

🔧 Say goodbye to stripped screws—grab the ProGrabit and own every fix!

UNIVERSAL GRIP POWER - Effortlessly removes damaged screws & bolts from tiny No.4 to robust 3/8 inch sizes.
COMPACT LIGHTWEIGHT - At just 109g and pocket-sized, it’s the perfect tool to carry for on-the-go professionals.
BROAD FASTENER COVERAGE - Extracts a wide range of fasteners including Phillips, Slotted, Hex, Torx, Tri-Wing, Pozidriv, and tamper-resistant types.
MULTI TOOL COMPATIBILITY - Seamlessly works with reversible drills and standard 1/4 inch hex screwdrivers for versatile use.
INDUSTRIAL STRENGTH STEEL - Crafted from high speed steel for unmatched durability and long-lasting performance.

The Alden 8440P ProGrabit 4-piece extractor set is a precision-engineered tool kit made from high speed steel, designed to remove damaged screws and broken bolts ranging from No.4 to 3/8 inch. Compatible with reversible drills and 1/4 inch hex screwdrivers, it handles a broad spectrum of fastener types, making it an essential, durable, and compact solution for professionals tackling tough hardware challenges.

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