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Heavy plastic center core
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Engraved graduations
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Open divided - 1⁄8˝, 3⁄32˝,
3⁄16˝, 1⁄4˝,
3⁄8˝, 1⁄2˝,
3⁄4˝, 1˝, 1-1⁄2˝
and 3˝ to the foot; one edge is divided in sixteenths to the inch
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Color coded for easy identification
