IOW, hinges are a huge PIA. At least this is what I have always thought of them on boxes. Now on doors. well I got used to them years ago. I kinda like the knife hinge, if it will work, but if the box is smallish, I also like 1/4" to 3/8" max on sides. Even 1/2" starts looking clunky, 3/4 just about sux for looks, unless it's a big beefy toolbox, even on a hope chest I like 5.8" better. I guess, even though it doesn't apply to me personally, thin is in.