The Duplo ruler design by Serbian innovator Snežana Jeremić looks like a regular ruler until you pick it up to use it. Divided up into two colored sections, the one side of the ruler has the ability to extend and retract making it super easy for designers, architects and engineers to measure and draw.
Most rulers are designed to be a rectangular unit with numbers along the side that consumers can use to measure objects and plot lines. The Duplo ruler keeps this familiar concept and simply redesigns the functionality of the ruler so that it is more practical for everyday use. The black part of the ruler stays put while the yellow side portion has the ability to slide around and snap into position making it easier to remember measurements.
Retractable Ruler Redesigns
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