After seeing these mentioned on various forums for the past year or so digikey finally realized my importance to them as a customer and sent me one... out of the blue, FREE!!!
This thing is very nicely made!!! and twice as long as the other PCB rules I've had a chance to use.
It's chocked full of indispensable reference info on both sides and would make a great practice board for SMD work
And they addressed the 1/8" 1/10" issue on the inch rule and split it half 'n half...
Front side:
Back side:
The mailer it came on:
sorry about the pic qualtiy... I've gone through almost a dozen digital cams in the past five years and been putting off buying another, they just don't hold up in the environment I exist in.