Abstract: A multi-use, interchangeable tool has a handle, an extension rod and an overhauling tool head. The handle has a mounting end and a first holding device mounted on the mounting end. The extension rod is telescopic and connected detachably to the handle with the first holding device and has a connecting end, a chuck and a second holding device. The connecting end is connected detachably to the mounting end of the handle with the first holding device. The mounting end is opposite to the connecting end. The second holding device is mounted on the mounting end. The overhauling tool head is connected detachably to the mounting end of the telescopic extension rod by the second holding device. Accordingly, the multi-use, interchangeable tool has changeable tool heads and is convenient to use and carry.