Abstract: A tool for cleaning the terminal posts of a storage battery, the posts being of different diameters. A socket body having an inside diameter large enough to engage over the battery post has a cut-away window in the circumferential wall thereof. The socket body is rotatable by means of a conventional socket wrench. A spring steel clip is movably affixed on the outside circumference of the socket with a free end thereof extending through the window into the well of the socket. The free end provides a scraping edge to engage the circumferential surface of a selected post when the socket is installed and enable said scraping edge to remove corrosive deposits upon rotation of the socket body.