Fastener installation system and related method

A fastener installation tool comprising:

• a handle including a body configured to be placed adjacent a first upper surface of a first board having a round upper first corner located between the first upper surface and a first side surface;
• a nose assembly joined with handle, the nose assembly including a guide defining a bore having a longitudinal axis, the guide having a first opening into which a fastener enters the bore and a second opening from which the fastener exits the bore;
• a first tooth fixedly joined with the nose assembly and extending downward therefrom adjacent the second opening, the first tooth configured to engage the round upper first corner between the first upper surface and the first side surface;
• and
• a second tooth joined with the nose assembly and moveable from a retracted mode to an extended mode, the second tooth configured to engage the first side of the first board when the second tooth is in the extended mode.

A method of using a fastener installation tool, the method comprising:

• providing a tool comprising a body with a lower surface, the body joined with a nose assembly including a guide defining a bore having a longitudinal axis, the guide having a first opening into which a fastener enters the bore and a second opening from which the fastener exits the bore, a first tooth fixedly joined with the nose assembly and extending downward therefrom adjacent the second opening, and a second tooth joined with the nose assembly and moveable from a retracted mode to an extended mode;
• placing the lower surface adjacent a first upper surface of a first board such that the first tooth extends downward from the nose assembly above a round upper first corner of the first board and such that the longitudinal axis aligns with the round upper first corner;
• and
• extending the second tooth from the retracted mode to the extended mode if a first side surface of the first board is unobstructed by a second board such that the second tooth is adjacent the first side surface of the first board.