Abstract: Applicant has disclosed a method and device (i.e., support tool) for installing sheathing (e.g., drywall or plasterboard). This tool enables a single person to easily attach the sheathing (e.g., by nails or screws) to an underlying structure (e.g., a wall stud, joist or rafter). In the preferred “device” embodiment, Applicant's tool is generally J-shaped with four tapered spikes (“teeth”) on its backside. The spikes are equally spaced from one another. By hammering the tool, its spikes can be driven into the underlying structure. No separate nail or screw is needed to hold the tool in place.