Let me tell you about the time this extractor kit saved me from a weekend-ruining disaster. I was working on my old truck's suspension when I encountered a bolt so rusted it looked like it had been fossilized. Normal sockets just spun helplessly.

The magic happened when I grabbed the 17mm extractor from this set. The reverse spiral flutes bit into that rounded-off mess like it was fresh butter. What shocked me most? It worked with my impact wrench - no special gentle treatment needed. The chrome-molybdenum steel didn't even flinch.

I've since used these on everything from lawnmower blades to patio furniture bolts. That 5/16" size? Perfect for corroded battery terminals when regular tools just slip off. The case keeps them organized in my toolbox, though I wish they'd included a 1/2" drive adapter - that's my only gripe.

Pro tip: These work best when you tap them firmly onto the damaged bolt first. That satisfying 'crunch' as they grip never gets old. For less than the price of two hardware store extractors, getting this whole set feels like cheating at mechanics.