Man, this order wound up on the slow boat! Usually EziUsin gets stuff to me a lot faster than this... As for the product itself - I can't say I'm entirely happy with it. 1. No, don't plan to buy the 2x50 and cut it up - the plastic snaps, and you lose at least one row of pins per cut, with more manual labor than you expect. 2. This is meant to be soldered on both sides. The rows are not the same length, and the shorter (inner) row isn't really long enough to insert in connectors. 3. The rows are 2.0mm apart - look at the diagram again, it *does* show that! I can't say it's anything other than exactly what the listing described, but it's not a "buy it for stock" type header - this seller has a ton of pin header like that (I love these guys) - but don't get it unless you know exactly what you need it for.