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We have to buy farm implements when it is broken. So we have to spend money for buying new tools. And When we bring the tools, we have to bring many kind of implements. But This concept doesn't need it. Because it can change the wood handle and any kind of tools. If the wood handle is broken, we can use any wood stick.
The most tool's handle is almost same. But we have to bring all of tools. So If we use this concept we can change to use implements easily.
the wood handle is fixed by nailing. And The implement's head is fixed by turning. So It will be difficult to get out from stick.