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Nice Helix© six-way triangular engineer’s scale is 12” long and has facets at 10 x 1/10 up to 12, and continuing all the way to 60 x 1/10 up to 72. If you need it for engineering purposes, you know the drill. If you just need a great ruler that looks much cooler than a flat one, this is it. In white plastic with color-coded facings.