Folding Boxwood Rule (Model T90300)
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DISCONTINUED (verified 12/95) RETAINED IN DATABASE FOR REFERENCE. The Folding Boxwood Rule, Model T90300 is a ruler made from wood that is hinged to fold into four 6 (six) inch sections. A single tactile dot is used to mark each inch and a higher raised dot is used every 1/2 inch. Braille is used to indicate each number.