Abstract: A tool for use in hanging siding, or the like, on a wall, the tool having a base member with a lip on the lower section for contact and alignment with a previously attached strip of siding, an outwardly and upwardly extending arm in the upper section for supporting a strip of siding in overlapping relation to the previously attached strip, and means for detachable securement of the tool to the wall, such as a hole adjacent the terminus of the upper section through which a spike is passed.