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"Bamboo" is a free to control the length of the screwdriver. There are many of size of screwdriver in repair personnel’s toolbox, that could face different position of screw holes, but it may used different size of screwdriver in each work. So that, the repair person always take the whole screwdriver with his work, it could increase the toolbox’s weight and not for health. Therefore, the design of concept is unitized column of the screwdriver, normal the unitized part could collect in handgrip, it could compose to the differnet size of screwdiver when it face the diffenert situation.
National Yunlin University
Yilan City, Yilan County, Taiwan