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:
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Back side:
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The mailer it came on:
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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.