Vices, clamps, presses, all these tools are mainly used for fixing, compression parts, in other words, working in compression. But sometimes it is necessary to solve the inverse problem: stretch a strong spring to pull the deformed steel strip, spread metal sheet. This will help a simple device, consisting of a solid stand, the lever and the two steel rods that perform the role of an axis of the lever and its pawl in lower position. The earring on the end of the lever is adjusted for the required size of the permutation axis in one of the holes of the rack, and the optimal gear ratio is selected by choice of the axial hole in the lever.
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