Patent 6901826 was granted and assigned to LG on June, 2005 by the United States Patent and Trademark Office.
A screwdriver includes a handle having a polygonal hole defined in a first end thereof for allowing an operate shaft extending into the handle. A locking device is mounted in the handle for selective holding the operate shaft in place. A controlling device is mounted to the handle and corresponds to the locking device for forward moving the slider and making the locking device disengaged from the operate shaft for adjusting the total length of the screwdriver.