Extender

The utility model relates to the technical field of extenders, and provides an extender which comprises a first extender body, and a second extender body is detachably installed on the lower right side of the first extender body. According to the extender, through cooperative use of a button structure and a first spring structure, when the extender works, the first extender is connected with a second extender through a cylindrical head screw, and then a button and a first spring are mounted at the top of the right side of the first extender through a second screw; meanwhile, a pressing strip is installed in the middle of the side, facing the first extender, of the second extender through a set screw and a second spring, the pressing strip is installed in the middle of the side, facing the first extender, of the second extender through a button, the problem that connectors of various upper dies and a machine are different is solved, the upper dies with different connectors can be effectively connected with the