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In general, when we use a ladder and a tool, we need to use these two things at the same time, like a needle and thread.
Therefore, we must carry the two equipments together when we move.
Since we need to move the two objects, the manpower that a user consumes and the hassle will be doubled.
But this has a merit of saving the man power to carry the ladder and solving the hassle caused as the ladder and the tool box are separated.
It is easily moved through the handle and the wheels built into. We can move it as if we drew a carrier. We can unfold or fold the 3-step ladder depending on usability and thus complete the ladder height we want.
Pohang, South Korea