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In our daily life, many kinds of wrenches are used and the hex wrenches are mainly applied. Even though all of them would be used occasionally, it is not convenient for having a large variety of specifications.
Two angle columns are added on a small-size monkey wrench to equip monkey wrenches with the functions of diameter-adjustable hex wrenches and diameter-adjustable wrenches
and meet the demands of daily use. Besides that, the improvement cost is low and hex nuts can be rotated.