The length of the traditional ruler is fixed, which causes many inconveniences and limitations in use. For example, when marking, cutting or measuring, it is impossible to operate beyond the inherent length of the ruler. The telescopic ruler adopts a three-stage embedded structure, which can be stretched layer by layer to about three times the length of the normal scale. It has a wide range of applicability and can meet the needs of various situations.

Country
CHINA

Year
2016

Designer
Xi Li, Yusheng Yin, Mengsheng Cai, Zhe Xu, Donglin heng