Abstract: Tool for efficiently hanging a siding plank on a wall in overlapping relation to a previously attached siding plank. The tool can be secured to a siding plank previously attached to a wall without using a hook that extends behind the previously attached siding plank. These features make the tool more convenient to use and allow the siding job to proceed more quickly. The tool is formed from an elongated base member. A first lip and a second lip project a predetermined distance from the same side of the elongated base member at opposing first and second ends thereof. A shelf or ledge is also provided on the elongated base member.