Incra Rule: a ruler with tiny holes to mark exact lengths

Marketed to engineers and carpenters, Incra's rulers have tiny stenciled holes for every fraction to make it impossible to mess up length markings. I got one to make puzzle boxes, but it's now on my office desk as my daily driver and will probably outlive me. The standard 12" model comes in at $25 and I can vouch for it, but there's a knockoff by General Tools that's just $10. I assume it's basically the same thing, but if you look closely on the product photos, the holes are somewhat larger.
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