I agree with FlyGuy. I myself work in a large factory and make parts all day long. I use my brown and sharpe (dial) and the same Mitutoyos that Creeper posted a link to. I beat the heck out of my tools all day, they get full of oil and metal chips nonstop. Our QA department checks and calibrates our tools all the time, mine have never been off. You get what you pay for! The moment you drop a set of calipers, they should be checked with gages to make sure they are holding tolerance (+- .001) with different sizes. I had dropped a brand new (3 months old) set of digitals, now they are trash, they were cheap. NEVER AGAIN.
Lock and load, the zombies (democrats) are coming (to take your guns)!