Originally Posted by
speedevil
Not likely that you'll be able to file them, hex keys are usually hardened. The only way would probably be to grind it, but the downside is that if you grind through the hardening, you would expose the much softer metal underneath.
That is true, but i figure the freebie tools from ikea or that come in a bike box for assembly aren't exactly high quality super hard tools to begin with. They only need to hold up to 5 to 7 nm anyway right?