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At 9" long and 3/4" thick, is thick enough to ensure teeth are being gauged at top of arc |
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Made from die-cast zinc aluminum alloy |
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Vertical markings on one side and horizontal on other so they can be read from any position |
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1/4" graduations on one end and 1/8" on other; any height or width from 1/8" to 2" can be set in 1/8" increments |
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Accurate to 0.005" or better |
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Patented |