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Cutting Ruler is a ruler that protects the ruler itself and the hand of the cutter from being cut by a blade when cutting a paper or other materials. Art designing knife has very thin blade and regular ruler has very thin front and that provides limited fasten area, which make both ruler and hand easily to be cut by the knife. Cutting Ruler added baffle-board to the front end, expanded the fasten area. The baffle-board is detachable. When detached, the ruler could be used just as regular one.
Zhejiang Normal University