Keson Folding Rule, English

6-1/2’ Long with ft., 10ths and 100ths one side; ft., inches, 16ths other side Made from specially selected fine Beechwood. Weather-resistant markings have a tough, clear protective coating. Steel springs have a precision lock action for extra strength when extended. Cleanly machined edges allow the rule to be snapped together easily and hold it stiff while measuring.