A hand tool includes a first part including a head and a shank. Three first holes are defined in the shank and each receive a first stop and a first spring therein. A second hole is defined in shank and located at an axis different from an axis of the first holes, a second stop and a second spring are received in the second hole. A second part is movably mounted to the shank and includes a positioning hole with which one of the first stop is removably engaged. The second stop is slidably engaged with a groove in the second part. A third part is mounted to the second part and includes button which is pushed to remove the first stop from the position hole so that the second part and the third part can be moved relative to the shank.