Sign up for
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
When you use the spanner, you may feel easier if the handle is longer.
When you use the screwdriver, you may feel easier if the torque is greater.
They always appear together,why not make them symbiotic,the idea is that the screwdriver can lengthen the handle of the spanner.Meanwhile, the spanner can help the screwdriver loosen tight screws.
Yang Nan Xu Honglei Lv Changfu Li Cun