http://redding-reloading.com/online-...ase-neck-gauge

I picked one of these up recently to measure run out and neck thickness. I have to say for the price $90ish, it's a really nicely built tool and easy to use.
It's also fairly compact, so if mounted to the bench, it doesnt take up much room. There are a lot of tools out there that will measure even tighter than this one, but your gonna pay top dollar for them! For the amateur or novice reloader who wants a good tool and not break the bank, this is a great tool for the price.