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Extension-type Screwdriv / Industrial design

Extension-type  Screwdriv
Extension-type  Screwdriv

This is a newly -designed, elastic screwdriver which is connected by an inner liner so that its head and lever will be retractable to adjust to various sizes of eyelets and screws. When not in use, it looks like any other common screwdrivers due to the spring device in it.

University

Shandong University of Science and Technology

Shandong University of Science and Technology
Qing dao, China

ke hu,
Shandong University of Science and Technology