the lateral member 11 by a coupler that when disengaged allows the level 4 to rotate relative to lateral member 11 and that when engaged prevents the level 4 from rotating thusly in another embodiment the level 4 may be removably coupled to the lateral member 11 using this embodiment an installer may remove the level 4 from the fastener guidance tool 9 and use the level 4 in areas where the entire fastener guidance tool 9 cannot be used embodiments may include other elements without departing from the scope of the present invention for example in one embodiment an attachment bracket not shown may be coupled to the lower end of the longitudinal member 7 to enable the tool to be used upside down such use could be needed for example when a final course of plywood sheeting is to be affixed to a roof with roof rafters already in place fig2 depicts a process 200 for building material installation that may employ a fastener guidance tool at block 202 process 200 begins at block 204 an installer abuts building material to a structural component the building material and the structural component may be composed of any suitable material in one embodiment the building material may be for example sheet rock and the structural component may be a wooden 2 u00d7 4 framing stud while in another embodiment the building material may be plywood sheets at block 206 the installer may align the fastener guidance tool with the structural component in one embodiment the act of aligning may include extending a positioning tab or some other physical alignment device beyond the back of a lateral member element of the fastener guidance tool in another embodiment the act of aligning.