Official Luthiers Forum!

Sometime in the past year there was a discusion about some 7" long plastic rulers that read in metric or imperial depending on which way you tilt the display. There is also a decimal equivalent chart in the center of the ruler. They were cheap and I thought they would be a fun holiday gift for some of my woodworker friends, so I bought half dozen. Now it's time to give them out, but I can't remember what the actual name of these are. Kind of dumb to gift them without knowing what they are. Anybody? Thanks, Bob

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“ The meaning of life is to find your gift and the purpose of life is to give it away” Pablo Picasso

Try "lenticular ruler"

Amazon carries different versions of them such as: https://www.amazon.com/Lenticular-Conversion-RUFD-006-Fractional-Decimal/dp/B0057XV87Y/ref=sr_1_17?dchild=1&keywords=lenticular+ruler&qid=1608421622&sr=8-17

I have one that is fractional/decimal/metric and another that's fractional/decimal in finer increments. They live on my bench.

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Once in a while you get shown the light in the strangest of places if you look at it right - Robert Hunter

Thanks guys. You got it! i can give these away now like I know what I'm doing. Enjoy the holidays as best you can. Stay safe!--Bob

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“ The meaning of life is to find your gift and the purpose of life is to give it away” Pablo Picasso