I'm a little wary of those cheap hex keys -- I've been burned a few times by them stripping out a hex head when the key was just a little loose. I know I should invest in some quality hex keys, but you are right -- it's hard to justify the purchase when I already have so many lying around.
Yeah. I think part of the problem there is also low-quality fasteners, but good hex wrenches do prevent a lot of problems.
As I go through my stash of direct-from-the-Shenzhen-market-at-10x-the-price fasteners from Amazon I'm replacing them with equivalents from McMaster. I have to say the increase in quality is noticeable. I half expect to break an Amazon screw and find that it's hollow inside to save a few cents.
