Abstract: A universal joint contains: a first connector, a second connector, a connection shaft, a first bolt, a second bolt, a first spring, and a second spring. The first connector includes a fitting orifice for fitting with a socket, two first rotatable tabs, and a first accommodation space defined between the two first rotatable tabs. The second connector includes a coupling post for connecting with a wrench, two second rotatable tabs, and a second accommodation space defined between the two second rotatable tabs and configured to receive the connection shaft. The first bolt is inserted through the two first rotatable tabs and the connection shaft, and the second bolt is inserted through the two second rotatable tabs and the connection shaft. When the two first rotatable tabs and the two second rotatable tabs are connected with the connection shat, the first rotatable tabs intersect with the second rotatable tabs.