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Usually, one should use two hands to dress a cloth, if the traditional rounded buttons were used, with one hand holds the button and the other hand helps to push the button into the hole on the clothing. It is not a difficult work for a normal, but it is hard for the children, elder, and disabled. To overcome the shortcomings, here we designed a U. D. button, on which a cutting edge is designed allowing the user can easily button the clothes using just one hand to “PUSH” buttons into the hole. This design can effectively speed up the buttoning process as well as make it easier for the disabled to dress.